do i have to do anything to allow for oversized valves? like piston wise?

And if i'm going to get a stage 2 turbo crower cam w/ ss valves, ti retainers, and springs, do i NEED to p&p the head and a valve job or is it not a NEED to do thing?

thanks.

 

well your gonna have to take the head off anywase so why not? i pretty sure you atleast have to do a valve job so the new ones seat right.