Hello, im building a j36 and wish to know if the bigger valve j37 will valve to piston contact those j32a3 piston.
I know its a direct bolt on swap, just cannot find information about piston.
There is a 1 mm intake valve difference between both head.


Also, what crank journal do i need, j32a3 one or j37a1 since i want to fit the 3.7 crank and rod.