I think the most interesting evaluation would be what the failure mode is of the stock motor. I.e. is it the valve train, is it the connecting rod bolts, is it high-rpm oiling to the journals, etc. Obviously the cam and heads aren't setup to flow at all above the stock range, but I would certainly be interested in hearing about the weak point(s). With proper flow, you could make a boatload of power with a bit more rpm... (say 6500-7000)