hey, lets get to the point. with no shim the valve is open. with a .060 shim i have a 1/4 marking off to the side of the top of the valve closer to the exhaust ports but with a .030 shim all of my marking paint was wiped off. i thought that it was supposed to be a narrow marking in the center of the valve stem. i got thumper heads and i can't figure out if i need different pushrods. i thought shims were supposed to fix any small changes that a head and f cam swap would cause. basically i just want to know if the markings are supposed to be narrow or if the paint was supposed to be wiped totally off the stem or is that just with roller tips. i will have my pushrod checker within a week