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Click on image for the lowdown. 
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| | | Forums66 Topics128,162 Posts1,056,933 Members48,458 | | 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: Jan 2015 Posts: 914 'Bolter | | 'Bolter Joined: Jan 2015 Posts: 914 | When I see a plug like that I think it is a core plug for the cooling system. Though there is not enough of the engine in the picture to take a good guess, and I have not seen enough of the backs of these engines to know for sure. Though somebody that does will be here soon with the correct answer. Jeffrey | | |
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