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Labor Day Putting down your wrenches or time for
MORE wrenching? 
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Dec 2001 Posts: 187 Shop Shark | | Shop Shark Joined: Dec 2001 Posts: 187 | Hi gang,
I have a small block V-8 from my parts truck. The casting number near the bell housing is 3970010 . My books, and MorTec, tell me this is either a 302, 327 or 350. However, on the front there is a code stamped in the ledge in front of the head. These are as follows:
C5J151717 VO716TXD
So what does this mean?
Any help would be appreciated!!!
Thanks, in advance!! | | | 
#8620 12/04/2004 11:59 PM | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | TXD codes to 1975 c20-3500 350. 165 HP 4 brl. Log on to www.nasty z28.com.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | The "T" in the suffix letters means it's got the 4-bolt main bearing caps. That's the first thing I look for when I'm collecting engines to build roundtrack cars. You've got a good beginning for a race engine, or a trailer towing rig.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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