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LT-1 Engine Stamp Pad Advice

Old 10-18-2018, 08:15 PM
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PreviousOwner
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Default LT-1 Engine Stamp Pad Advice

Ok, I know enough to make me dangerous. Seller swears car is all original, been in dry storage, etc., etc. Just unsure of this pad. No offense intended, it just looks too smooth and I don't see ANY broach marks. Would appreciate others' opinions. Thanks in advance!


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Old 10-18-2018, 09:03 PM
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Do you have a closer picture?
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Old 10-18-2018, 09:40 PM
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Here are 4 real '70 LT-1 stamps to compare your example with. Notice that 3 were stamped the same date; Dec 19th and have the same characters.





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Old 10-18-2018, 09:43 PM
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That fuel filter is not original, and rubber tubing on the pressure line between the fuel pump and the carb is dangerous.
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Old 10-18-2018, 09:47 PM
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No, avalonjohn, that's all I was given and he insisted on sending it to my phone. I've since emailed to my desktop for further review.
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Old 10-18-2018, 09:57 PM
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Thanks toylman,
I can see that the ones in the day of February are a different font and the "C"s, in CTU looked more closed. That's kinda what I was afraid of. Magnified it 400 times on my desktop and couldn't spot an inkling of any broach marks, rust, or scratches.
Dang, it was a pretty good job, though!
Appreciate the pics to compare to.
Best,
PO
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Old 10-18-2018, 09:59 PM
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Originally Posted by Bikespace View Post
That fuel filter is not original, and rubber tubing on the pressure line between the fuel pump and the carb is dangerous.
Hmmm, didn't catch that either. Was told fuel tank was all gummed up and was replaced. I'm assuming they "bubba'd" some items just to get it running. Thanks!
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Old 10-19-2018, 08:47 AM
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I would not get wrapped up in the slight differences in a character. There were more than one exact character in the bin. I would expect them to match for any given day but could vary a bit one day to the next.

The thing that jumps out is the lack of broach marks in the picture, and more importantly - EVERYTHING in the picture has some corrosion EXCEPT the pad. I would always get the cast date off the back of the block to do a reality check too.

That looks like it might be an aftermarket glass fuel filter setup. It is a fire bomb about to go off. The rubber seals in the filter shrink when the gas is out of them for an extended time then the gas will start spewing once the fuel pump starts pumping again.
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Old 10-19-2018, 10:12 AM
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I'm no expert on stamps and your example may or may not be factory; examples were for comparison. Not the best picture, but '70s had double hump heads.
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Old 10-19-2018, 03:32 PM
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I am not expert in regards to the stamping, but I have seen some pads that were "cleaned up" for photo purposes that looked a little too neat. but were real The flash from the camera may also affect the way the broach marks show. You need more pics at different angles with and without flash to ascertain the true nature of the broachmarks. With regards to the actual characters I am at a loss unless they are obvious. All I can say is buyer beware and do our homework. Remember there is a long list of LT1 distinguishing characteristics on the car beyond just the engine. I would look at the whole picture to see what else is correct or incorrect... Ike
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Old 10-19-2018, 11:56 PM
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no broach marks, no patina, several items just in that one pic to show that the car is not all original.
as stated look at date codes and all the LT1 characteristics if that is what you require.
lower your offer accordingly..
this seems to be a car with an excuse so watch out. only pay what it is worth.
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Old 10-20-2018, 10:19 AM
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Originally Posted by PreviousOwner View Post
Was told fuel tank was all gummed up and was replaced.
Did they save the tank sticker while replacing the gas tank? That would tell all.

R

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Old 10-20-2018, 06:06 PM
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Thanks for all the responses thus far. I have written the seller & the casting date falls in line. I've also asked for the block casting # and about the tank sticker (if it's still around). It DID have the TI but is gone & just has the 3 holes now. I'm trying to find my list of items unique to the LT-1s and will peruse each one. Supposedly, the dizzy is original and correct. I remember those being pricey. No A.I.R. but not that uncommon.
Any other thoughts, please advise, and, thanks again.

PO
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Old 10-21-2018, 12:18 AM
  #14  
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The heads do not have the double bump, so they are not original. Pull the valve cover and check the casting no.
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Old 10-21-2018, 11:25 AM
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No TI unit mounted now but distributor is original? Loose from the car? or in service/converted to points? Cant run a TI without the box.

Smog heads are not original. Intake looks to be polished with 12 point fasteners.....????

Stamp pad is not typical.

Just not feeling the "all original" vibe here.
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Old 10-21-2018, 09:47 PM
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Thanks for all the help guys. Here is the original eBay listing (don't forget eBay plays games with all the ended auctions now). Sounds like some of you had already found it. I had an email last night telling me someone gave him $28k for the car and it's gone. I, too, was suspicious about numerous items and the more questions I asked, the less answers I got. Oh well.
https://www.ebay.com/itm/1970-Chevro....m43663.l10137
All the help much appreciated,
PO
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Old 10-22-2018, 07:46 AM
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Have a feeling it was a legit car. Marks look like they are there, flash throws it off.
Hard to expect a car that old not to have been torn into at some point.
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Old 10-22-2018, 11:27 AM
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the small camel hump heads were orginal, and the pad looks original.
I have 2 known original 69 corvettes, they are nearly identical. (Engine Pad)

Last edited by 69Vett; 10-22-2018 at 04:59 PM.
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Old 10-22-2018, 12:39 PM
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Sounds like the OP missed out on a decent opportunity because of folks jumping on the issue of "broach marks". These non-experts (some posters WERE legitimate experts) need to back off when they have no first-hand experience with such technical issues. Broach mark "chatter" shows up as the bar wears down from use. When a broach bar is freshly resharpened, there are almost NO MARKS ON THE SURFACE at all. Sure, the surface can be manipulated and appear abnormal; but basing legitimacy of an engine ONLY because of light or non-existent broach marks is and this practice of chiming in about it should cease.

Just let the stamp pad experts answer these requests...PLEASE! (And I do not consider myself an 'expert' on this issue except for understanding what surface texture to expect from a broached surface.)
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Old 10-22-2018, 12:49 PM
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Originally Posted by 69Vett View Post
the small camel hump heads, and the pad are both original.
I have 2 known original 69 corvettes, they are nearly identical.
Heads were not camel hump - they were actually later design crappy smog heads stated by seller to be "original".
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