I have a 55 235 in my 52, with the short water pump, it too is low, but always cooled fine. If I was going to do it again would try one of the adapters to use the 216 pump at the correct height.

Do you have a picture of the mount problem? I can then go compare it to mine.

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-