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Labor Day Putting down your wrenches or time for
MORE wrenching? 
Plenty of places to share. | | Click on image for the lowdown. 
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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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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#73814 02/23/2007 9:11 PM | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | Clutchheadstew,
Interesting stuff. I don't know if GMC used many different vendors for motors, or just their own stuff. The vintage truck site shows a beautiful '51 640 and it notes it has a 503 engine in it. I used to drive a 10 wheel 'Cornbinder' with a huge gas V-8 in it, but my search didn't indicate IH made a 503 cubic inch motor....bigger, yes!
Someone with some knowledge will turn up I'm sure!
Stuart | | |
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