Originally Posted by Pre '68 Dave
...I assume you mean a modified long shaft pump. They can work OK but are not the best for cooling.
I'll second that. I ran a short pump in my 1 ton for years and it was just marginally OK at cooling.
Had I known then about the water pump adapter plate I would have used one then and recommend that you use one now.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-