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| | | Forums66 Topics128,139 Posts1,056,455 Members48,441 | | 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
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| | | | Joined: Dec 2000 Posts: 3,399 Gas Pumper | | Gas Pumper Joined: Dec 2000 Posts: 3,399 | I am trying to figure out without draining the water out of my engine what the rear drain on our engines is sized. 1/4 NPT or 3/8 NPT. Depending on how I hold my head while staring at the outside of it, I could go either way. Anyone know for sure. I think they are the same for the 216/235/261 engines.
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