Hi Yall, Looking into doing the conversion of my 360 to a 390. Been wanting a few more ponies for my 68' F250. I already have a 3.78 stroke crank and a set of 6.49" rods. But I am trying to find out if I can use the 360 pistons for the conversion or do I need 390 spec pistons. I have heard that the 360 pistons were 390 4V parts, and that they have 3904V stamped into them. Does anyone know??? I read in another post from another user on here was talking about Dave Shoe as an FE GURU; can someone refer me to him, or know where I can reach him??? Any info would be really appreciated. Thanks,
Don

 

You are correct. Those pistons will give you car compression ratio too. Not the lower truck one.

 

Dave Shoe can be found on the FE big block forum on Network54.com