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Click on image for the lowdown. 
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| | | Forums66 Topics128,053 Posts1,055,777 Members48,426 | | Most Online14,466
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!
| | | | Joined: Dec 2017 Posts: 1,652 'Bolter | | 'Bolter Joined: Dec 2017 Posts: 1,652 | Yes, the concave plug, should be 2 inches, is for the back of the block, the large cupped plug is for the cam.
Last edited by Dragsix; 12/07/2019 1:32 PM.
Mike
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