C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Mar 1, 2026 | 03:15 PM
  #41  
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Nope
YOUR 10MT clone starter and the Bosch 10MT clone example, are Both the old-fashioned, heavy Delco Remy 10MT direct drive design; both long-superseded by more modern PG260 aka PMGR i have suggested.

FWIW, the current PG260 design was originally a Remy design, as well.

I dunno WHO manufactures YOUR 10MT clone, I do KNOW WAI GLOBAL also manufactures 10MT clone replacements (perhaps yours, dunno).

It's my fair assessment that You CAN use YOUR 10MT starter with 350/357. I'm a firm proponent of modern PG260 aka PMGR design.

FWIW:
see the very large, countersunk, black-colored PHILLIPS head screw that fits THRU side of your gold- colored starter case ?
That's dead giveaway a starter has field coils (instead of permanent magnets). There are Four palm-sized, inter-connected field coils arrayed around inside of 10MT case. EACH has a ferrous pole shoe which is held tightly away from armature by those large Phillips. Some so-called mini starters also have field coils BUT their cases often have labels which mask the presence of Phillips/field coils.
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Old Mar 1, 2026 | 03:25 PM
  #42  
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Here's WAI GLOBAL offering of DR 10MT direct drive starter their P/N 3510N (it's painted black)

https://www.waiglobal.com/us_en/wai-3510n.html

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Old Mar 1, 2026 | 05:44 PM
  #43  
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I see the difference now, thanks.

JT
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Old Mar 1, 2026 | 05:55 PM
  #44  
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One thing I notice on some starters is they include a couple of shims. What are they for?

JT
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Old Mar 1, 2026 | 06:01 PM
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Compared to modern designs, 10MT starters' manufacturing tolerances are such that shims are often required to properly set gear mesh-tooth engagement. This especially so with Remanufactured 10MT.
OTOH, PG260 rarely ever need any shim. I've never needed any w/ PG260.
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Old Mar 2, 2026 | 04:10 PM
  #46  
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Well my local Chevy dealer could not match Summit's price so I guess I need to order the engine from them.

JT
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Old Mar 2, 2026 | 04:40 PM
  #47  
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Originally Posted by jthornton
Well my local Chevy dealer could not match Summit's price so I guess I need to order the engine from them.

JT
Am under impression you were to receive pricing per GM dealership, friend of a friend etc 'at cost'. That won't meet or beat summit ?

Have you settled on which (or whose) hill you're gonna die on ?

Old info that don't apply; but cause for reflection:
As the NAFTA was on life support, and the USMCA was the new standard, and Mexican L31 production had ceased, and production at Springfield wasn't yet capable --- Those brand new L31 were trading for as low as $1600 delivered (yes, they had different GM P/N then as well). Wish I'd bought a freight car of em. When the Mexican tank went dry, prices surged; SRC's L31 production came up to speed and GM pricing went thru the roof.
Here we are approaching $6K
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Old Mar 2, 2026 | 05:11 PM
  #48  
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So what timing pointer and harmonic balancer do I need for the 350/357?

Past $6k now...

JT
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Old Mar 2, 2026 | 05:36 PM
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Originally Posted by jthornton
So what timing pointer and harmonic balancer do I need for the 350/357?

Past $6k now...

JT
Yea that was for L31

So are you buying parts at GM dealership, or Summit, or RA ???

are you going to use EXISTING water pump, brackets, pulleys etc?
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Old Mar 2, 2026 | 05:43 PM
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The GM dealership didn't meet Summit's price so I'll order it from Summit.

New water pump, harmonic balancer, timing pointer, intake manifold, flexplate, distributor and existing brackets and pulleys.

JT
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Old Mar 2, 2026 | 06:08 PM
  #51  
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JT, you're killing me! LoL. It's time to order the Blueprint 350/341HP, a Blueprint flex plate and harmonic balancer from Summit. Forgot about the PG260 starter. Get the 9100 Powermaster starter. ACDELCO 252585 Water Pump. Trust me 😉.

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Old Mar 2, 2026 | 06:24 PM
  #52  
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8" damper
Pioneer DA3502

damper bolt
GM 9440024

timing tab
GM 12342011

fish or cut bait; which hill ?
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Old Mar 3, 2026 | 11:05 AM
  #53  
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Originally Posted by Rebelyell
Am under impression you were to receive pricing per GM dealership, friend of a friend etc 'at cost'. That won't meet or beat summit ?

Have you settled on which (or whose) hill you're gonna die on ?
The first price he came back with was the list price! So I told him what the current price of the engine was and he could not meet that. The friend of a friend is the sales manager not the parts manager so he can only ask. The parts manager did give me a killer price on the q9i wheels for my C8.

It looks like Summit is the go to place with free shipping. I just have to get the BP engine returned to BP.

JT
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Old Mar 3, 2026 | 11:37 AM
  #54  
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The Blueprint 341 HP long block is ~$5000
The GM is over $6000.
Advantage?
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Old Mar 3, 2026 | 11:43 AM
  #55  
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Originally Posted by Rebelyell
Starters:
smaller 153T flexplates-flywheels are paired with starters having Two bolts that are in-line AKA straight-across from one-another. The Two bolts re Unequal lengths
OTOH
larger 168T flexplates-flywheels are paired with starters having Two (equal-length) bolts that are staggered AKA offset from one-another.

I recommend modern, starter like what GM has employed to supersede the Old 10MT direct drive starters.
The modern starter designated PG260 aka PMGR because; it has Permanent Magnets (in lieu of heavy, amp-hogging field coils & pole shoes) And have an internal planetary Gear Reduction. New PMGR starters Require New Specific Bolts, weigh less than Ten pounds and have an excellent service record; proven over past Thirty-plus years of OE.

Here's good choice from Rock Auto w/ life warranty REQUIRES NEW BOLTS, some guys have received them with this starter. Works with or without points ign and is configured to fit 168T flexplate. WAI GLOBAL P/N 3510NPG

https://www.rockauto.com/en/moreinfo...t=4152&jsn=643
I see that the starter you recommend has 4 nuts on the solenoid, so it can support points ignition.
I did not know there was a version that did that.

Think this unit has enough TQ for a 454 BBC?
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Old Mar 3, 2026 | 01:02 PM
  #56  
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Originally Posted by leigh1322
The Blueprint 341 HP long block is ~$5000
The GM is over $6000.
Advantage?
Summit Racing™ All New 300 HP Small Block Chevy 350 Crate Engines SUM-150350 $4,499.99
BluePrint Engines 350 C.I.D. Cruiser Crate Engines BP350CT $5,099.00
Chevrolet Performance SP350/357 Base Chevrolet Crate Engines 19433032 $6,215.21

I have time to think about it until the 390HP gets back to Blueprint and they refund my money.

JT
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Old Mar 3, 2026 | 02:01 PM
  #57  
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Originally Posted by jthornton
Summit Racing™ All New 300 HP Small Block Chevy 350 Crate Engines SUM-150350 $4,499.99
BluePrint Engines 350 C.I.D. Cruiser Crate Engines BP350CT $5,099.00
Chevrolet Performance SP350/357 Base Chevrolet Crate Engines 19433032 $6,215.21

I have time to think about it until the 390HP gets back to Blueprint and they refund my money.

JT
Once again
MFRS' Warranty only Legally enforceable In jurisdiction(s) where the manufacturer has a physical presence; verify that w/ Your local atty.

Regardless, ATK aka Vege do your homework.
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Old Mar 3, 2026 | 02:12 PM
  #58  
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Speaking of warranties

GM
GM Performance parts are sold without a warranty. Parts thought to be defective upon initial installation can be returned for inspection and will be handled case-by-case. GM Performance transmissions, short blocks, and components are covered under the provisions of the GM Dealer Service Parts and Accessories Warranty for 12 months from the date of original sale or 12,000 miles, whichever comes first. GM Performance crate engines are covered under the provisions of the GM Dealer Service Parts and Accessories Warranty for 24 months from the original sale or 50,000 miles, whichever comes first. This excludes engines, transmissions, and components that are used in racing, competition, marine, motorcycle, or other non-vehicle usage. This also includes engines, transmissions, or components that fail due to alteration or improper use. GM Goodwrench engines installed as direct replacements in a car or light truck application are warrantied for 36 months or 100,000 miles from the time of purchase, whichever comes first. This warranty is the same regardless of who installed the engine. GM Goodwrench engines used in medium-duty truck applications (40 through 70 Series) are warrantied for 18 months with unlimited miles if installed by the dealership, or 12 months with unlimited miles if installed elsewhere. This warranty does not cover vehicles registered and normally operated outside of the United States. For additional information, please visit http://www.chevroletperformance.com/...arranty_4C.pdf

Blueprint
Warranty claims must be filed with the manufacturer in accordance to their policies.
Automobile crate engines carry a 30-month or 50,000-mile parts and labor warranty. Marine Crate engines carry a 12-month parts and labor warranty. Short block engines carry a 12-month parts only warranty. Race/Motorsports engines carry no warranty. Bare blocks carry a 6-month warranty if unaltered. BluePrint Engines expressly warrants that its engines are of good quality and free from defects in materials or workmanship. Purchaser acknowledges that BluePrint Engines has made no affirmation of fact or promise relating to its engines outside of this limited warranty and BluePrint Engines has provided the purchaser no description, sample, or model of its engines upon which the purchaser has relied in deciding to purchase a BluePrint engine. BluePrint Engines will, at its sole discretion, replace defective parts or a complete engine. All repairs will be made at the seller's or distributor's costs, plus applicable labor. Prior authorization is required from BluePrint Engines before warranty work is begun. Call BluePrint Engines at (888) 808-9573 for a numbered authorization. Warranty claims with BluePrint Engines will take 2-3 weeks to process.
*** For complete BluePrint Engine warranty information, click on the "Instructions and Calculators" tab above, then click on "Charts and Guides." ***

Edit: some BBB reviews about BluePrint

Summit
Summit Racing Equipment® warrants most products for one year from the date of purchase. If the product is used for racing or competition, this warranty is limited to manufacturer defects only; wear and breakage are not covered under any circumstances. If the product shows, in our opinion, evidence of being used or installed contrary to the instructions and/or subjected to improper handling, packaging, or shipping by the customer, it will not be covered by our limited warranty. The liability to Summit Racing Equipment® for losses or damages arising out of any cause whatsoever is limited to the full refund of the purchase price or, at our option, repair or replacement of the product(s). Summit Racing Equipment® shall not be liable for any consequential or incidental damages. Some states do not allow the exclusion or limitation of consequential or incidental damages, so the above limitation or exclusion may not apply to you.

Summit Racing™ laser-etched sockets are backed by a limited lifetime warranty.

Edit: These engines are assembled for us by the guys at ATK, and backed with their 2-year unlimited mile warranty for peace of mind.

And Missouri Law on exclusion or limitation
Limitations and waivers of consequential or incidental damages are generally enforceable in Missouri, contrary to the assertion in the query, provided they are not deemed unconscionable. Under Missouri's Uniform Commercial Code (UCC), specifically Mo. Rev. Stat. § 400.2-719, parties are permitted to contractually limit or exclude consequential damages.

JT

Last edited by jthornton; Mar 3, 2026 at 02:21 PM.
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Old Mar 3, 2026 | 02:40 PM
  #59  
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I did find the installation guide for the Chevy 350/357 with a list of all part numbers.

JT
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Old Mar 3, 2026 | 03:04 PM
  #60  
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So on the Blueprint engines their warranty only covers the price of the parts if I install the engine.

Seems like a crap shoot for any of them...

JT
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