Originally Posted by Geno750

My head's setup is very similar to the one in the 9000rpm head thread.

Supertech +1mm oversized nitrate intake valves, and +1mm oversized inconel exhaust valves.
6mm bronze intake and exhaust valve guides (stock exhaust valve stem size is 7mm, converting to 6mm reduces valve train weight).
Dual keeper rocker arm conversion with Tomei solids (the trick here is setting the tip height with the two keepers then setting the valve lash by shimming the the tomei solid by placing the shim under the pivot instead of raising the rocker arm via shimmed guides)
Supertech dual valve 106lb springs & ti retainers
HKS Step3 272 cams

With that said, I have built a SR with nothing but springs, 256 cams, 740cc nismo's, z32 MAF, rom tune and a 2560R turbo. It was an absolute blast. In fact a friend of mine will be doing the same thing with the only difference being the Tomei turbo.