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Click on image for the lowdown. 
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| | | Forums66 Topics128,068 Posts1,055,880 Members48,428 | | 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 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | I'm trying to compare the water flow capacity of the early vs. late engines and pumps.
ve made a rough guess (via Photoshop) of the late water inlet at about 5-7/16" diameter, and the 2 smaller early holes at about 1-9/16" each.
Is this pretty close?
Forgive me, I don't have the parts where I can measure them. | | |
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