When I do some major metal butchery on that head- - - -bigger intake and exhaust valves, recessing the intake valves back to the proper depth, opening up the combustion chamber around the bigger exhaust valves to unshroud them, and a few other kinds of metal butchery- - - -I'll have one of two things- - - -a really good-performing head that can be paired up with a pretty radical cam, or a boat anchor! I won't really know until I'm about 75% of the way through the job. If I end up making the head worse than it already is- - - -no big loss, as I can use the new valves in a different head if that one can't be salvaged. I've got a few other sneaky tricks up my sleeve for the engine, other than the cylinder head mods I've mentioned.
Jerry
