C3 Big Block

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Mar 7, 2011 | 07:05 AM

65396

Thread Starter

Cruising

Joined: Feb 2011

Posts: 13

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C3 Big Block

I searched the archives first and came across plenty of C2 answers but nothing for C3's. I'm looking at purchasing a 1970 454 Roadster, the owner has never dropped the tank so there's a possibility something might be there. In the meantime what else sets a BB apart from a SB? It is a numbers matching 454, (restamps worry me), with a big block hood, what are some of the less noticeable items that set a BB apart?

Thanks,
Dave

Mar 7, 2011 | 07:11 AM

briaineo

Racer

Joined: Nov 2005

Posts: 340

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From: Dublin

Tach Redline

You can check on ecklers.com for the correct replacement one:

http://wac.3c1a.edgecastcdn.net/803C.../sku/42170.jpg
http://wac.3c1a.edgecastcdn.net/803C.../sku/42170.jpg

Corvette Tachometer, 5500 Red Line, 1969-1971
Reproduction Of Original
1969 427ci/390hp
1969 427ci/400hp
1970 454ci/390hp
1971 350ci/255hp With Air Conditoning
1971 454ci/365hp

Mar 7, 2011 | 07:20 AM

nutsy

Melting Slicks

Joined: Sep 2007

Posts: 2,387

Likes: 123

From: CA.

rear sway bar. i beleive heavy duty coil springs.

Mar 7, 2011 | 07:29 AM

69ttop502

Le Mans Master

Joined: Mar 2001

Posts: 6,237

Likes: 1,009

From: Watkinsville, GA and Glen Cove, NY

U-joint caps on the halfshafts as opposed to straps.

Mar 7, 2011 | 10:17 AM

BBCorv70

Melting Slicks

Joined: Apr 2007

Posts: 3,189

Likes: 111

From: Tolland CT

I'll toss in a few more..

Wider radiator and support, 27 1/2 inches.
Different hood, same as LT1 but with 454 numerals.
Console tag

Mar 7, 2011 | 10:20 AM

MrJlr

Race Director

Joined: Feb 2006

Posts: 12,239

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From: Chino CA

Weight

Mar 7, 2011 | 10:32 AM

joewill

Safety Car

Joined: Sep 2007

Posts: 4,458

Likes: 330

From: Indy Indiana

http://forums.corvetteforum.com/c3-g...big-block.html

Mar 7, 2011 | 10:40 AM

joewill

Safety Car

Joined: Sep 2007

Posts: 4,458

Likes: 330

From: Indy Indiana

Quote:

Originally Posted by briaineo

sorry, but these are incorrect, the correct redline for a BB is 5600.

here's a pic of a correct BB 70 tach

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Mar 7, 2011 | 12:00 PM

Easy Mike

Team Owner

Joined: Jun 2000

Posts: 38,923

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From: Southbound

Cruise-In II Veteran

Any original factory documentation with this car?

Mar 7, 2011 | 10:17 PM

#10

TheSkunkWorks

Le Mans Master

Joined: Apr 2007

Posts: 7,353

Likes: 72

From: Graceland in a Not Correctly Restored Stingray

Quote:

Originally Posted by MrJlr

Weight

A healthy '70 LS5 is far from being the supermasive, impotent lump many are lead to believe, despite the extra pounds over lesser SB's.

Mar 8, 2011 | 11:52 AM

#11

BBCorv70

Melting Slicks

Joined: Apr 2007

Posts: 3,189

Likes: 111

From: Tolland CT

Quote:

Originally Posted by TheSkunkWorks

A healthy '70 LS5 is far from being the supermasive, impotent lump many are lead to believe, despite the extra pounds over lesser SB's.

Can't beat the sound they make or the raw torque. I owned a small block fist, then a couple big block vettes. I'll never go back...

Mar 8, 2011 | 08:09 PM

#12

John 65

Le Mans Master

Joined: Dec 2003

Posts: 5,381

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From: N J

7 leaf spring vs 9 for the small block I believe.

Mar 8, 2011 | 08:30 PM

#13

Bob Heine

Pro

Joined: Jan 2010

Posts: 533

Likes: 18

From: Boca Raton Florida

Quote:

Originally Posted by John 65

7 leaf spring vs 9 for the small block I believe.

F41 suspension gives you the 7-leaf. My 72 big block has a 9-leaf and skinny sway bar in back.

Mar 8, 2011 | 08:40 PM

#14

65396

Thread Starter

Cruising

Joined: Feb 2011

Posts: 13

Likes: 0

No factory documentation, according to the seller the tank has never been dropped so a glimmer of hope? Someone from the forum will be available on Thursday so hopefully I'll get a better picture. I'm a bit concerned that he says the engine assebmly date and designator are the same sized stampings as the vin sequence.

Anyone ever heard of that? Everyone I've ever seen display the vin sequence much smaller.

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