i have a ls block, i want to use b16b pistons on ls rods with the ls crank, i will be useing a itr head with itr cams do you think ill have an issue with valve clearance i predicted compression around 12:1 any info is appreciated

 

The Ctr piston has quite a dome to it so better clay the motor to be sure.

 

i plan on doing most of the work my self in my garage where can i find this clay and how do i properly use it