anything on the internet about the amount of Clearence between the NPI pistons and the PI swapped in heads? i want to make sure of everything before i attempt the swap. i already have the heads and intake. need the gaskets.

so, how much clearence from the valves to the piston do i have to work with? and i gather a tune is neccessary?

 

noone?


not even one person?

 

What are you worried about PTV contact? with stock cams its not going to be a problem. And their are guys running the comp 270 cams in that combo and those are big cams. If your using stock cams, just degree them correctly and there will be no problem. Besides that I cant help with the figures. You could always check it yourself once you start the tear down with some clay to see the clearances.