DaveH

After you machine the head surface, then you do a valve job that sinks the valves back into the combustion chamber a ways, getting some of that head volume back, along with allowing you to use those Crower cams without the lash caps.

motorheaddown

It's a nice thought, but according to Crower's web site: http://www.crower.com/cat/other.shtml even a 256 regrind cuts too much base circle to use stock shims. Crower advertises 5-10 degrees more duration at 0.050", but there's only about an additional 0.015" that the base circle can be reduced before the maximum shim thickness has been exceeded.

Hopefully, I'm wrong. Someone care to check my reasoning?

I guess you could hardface the cams, but I'm not comfortable with adding material to the lobe.

-scott