My truck is a 37 1/2 ton pick up with a 56 261 in it. The front mount is the standard older truck front mount, on the cross member under the timing cover. The rear mounts are on the bell housing. I have the short shaft water pump sold by Patrick's and others. I bought mine from [censored] Larrowe. I've got a 15" Derale Flex Fan mounted with a 1/2" spacer. I have another spacer that is 1/8" I can add if I have to. That spacer would put my fan about 1/4" away the harmonic balancer and about 1/2" or slightly less away from the radiator. Even when the 216 cu. in. engine was in my truck, I was working with no more than 5/8" from the stock fan to the radiator.
It's very cozy in there!

"Truckin' Around .......... Since 1937!"
My name is Joe and I am addicted to Classic Country Music. I just can't hep myself.
Operators are standing by to take your calls!
Now cruising in the Passing Lane