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Posted by Will (in IL) [98.215.26.138] on Thursday, January 12, 2012 at 12:46:50 :
In Reply to: Re: Still looking for... and a dumb question. posted by Tom in Indiana [216.249.74.130] on Thursday, January 12, 2012 at 07:59:32 :
Waterpump, fan and pulleys:
Pictured above are an early steel waterpump ('61-'68, left) and a late aluminum waterpump ('69-, right).
The early steel one is .700" shorter than the later one but the outlet is on the wrong side. The aluminum one has the outlet on the correct side but is too long. There are two ways to get around this. You can either move the lower radiator outlet to the left side or you can purchase an aluminum pump from us that has had .600" machined off its nose then a new shaft and seal installed.
If the V8 is going into a WM300 that has a 251 engine you can use the stock unmodified aluminum waterpump since your truck has an extra 2" of radiator clearance.
The crankshaft pulley you will need to find off of an early '58-'68 Chrysler car with power steering. These also came on 273 V8s. These can be used with the shortened aluminum waterpump or the early steel one and will let you mount a power steering pump.
If you don't want power steering you can use one of the easier to find single groove pulleys that came on most of the cars and all of the trucks.
If your truck had a 251 flathead you can install the late model pulleys that come on the modern truck engines using the unmodified aluminum waterpump.