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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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| | | | Joined: Jul 2010 Posts: 592 Shop Shark | | Shop Shark Joined: Jul 2010 Posts: 592 | Your '57 235 would have been born with a 1.5" outlet at the tstat housing and a 1.75" inlet at the water pump. The short water pump sounds like it has a 1.5" inlet.
Your 1.25" upper hose is incorrect...you'll need a 1.5".
You can buy a reducer/expander at most FLAPS to solve your 1.75" to 1.5" dilemma.
Your question about bottle neck is valid, but you will encounter the same problem regarding flow if you switch radiators to one with a 1.5" outlet. The reducer/expander isn't elegant, but it will take care of your issue.
Matt | | |
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