My 55 engine in 52 truck with shortened water pump (I did it) had next to no clearance and only worked with the old 216 fan...
Had it been an option at the time I for sure would have used a water pump adapter kit. I recommend anyone in the same situation use one, sure seems like the perfect solution!

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-