.............. The bottom of the wpp and the top of the csp are only separated by 71 thousands of an inch. I used my feeler gauges for this................ Carmine.
Glad you didn't have to do what I did to get clearance between the wpp and the csp on the truck 409 that I ran in my 55 T-Bird. I put that engine together using parts and pulleys from who knows from where and the wpp and csp touched each other and with the engine running made odd noise. Couldn't figure out how to lower the csp so I raised up the wpp. Being a rather thrifty person I removed the water pump and using a rat tail file elongated the bottom of the four water pump mounting holes so I could raise the water pump up just enough for the pulleys to not rub together and fixed the problem for no cost. Also orange juce cartons make fine water pump gaskets. I'm not cheap - I just don't have any money.