The adaptor plate will work on any 235 from 55-62, whether it be a car or truck motor. I tried the so-called "short pump" and it failed to give me adequate pump snout/radiator clearance to run anything but the puny stock fan, kept the fan down low so that I had interference problems with the fan/harmonic balancer.
As I mentioned before, the adaptor plate/early pump/5 blade fan has proven to be the cure for all of the cooling problems we experience with the later model 235 engines in the AD trucks.
If nothing more, fill your engine through the thermostat housing, install a 180 thermostat to slow the flow of coolant through the radiator, fill the radiator and give it a shot. If you have overheating immediately you need to run a radiator pressure test to see if you don't have a leaking head gasket that is pressurizing your cooling system and belching out your coolant. You can sometimes get an idea by topping off the radiator, pinch the overflow hose to you can fill it all the way up to the top of the neck....run the engine at fast idle and watch for big soapy looking bubbles that smell of gasoline. A bad head gasket between the cylinder and the water jacket is not that uncommon of a problem, especially in an engine that has run hot.
Hopefully, filling the system completely and adding the thermostat will bring your overheating problem under control. I've outlined the best fix to insure you'll solve ALL your cooling problems. The choice is yours....
Dave
