I'm some what confused here, I've been reading as much as I can about this and from what I've read 2.02 valves hurt port velocity and that's what I read to get to my goals. The engine will probably never see more than 5,000 rpm's.
Well
U can certainly achieve your goals with smaller valve u mentioned !
A good valve job and street compression with the PROPER cam will get u to your goals camshaft is the brain get the right one.