I'm reading and reading about the best motor configuration for my 72 narrow body ; what is needed to bring the rpm limits to 7500rpm or so ?? I know a good builder (!), but why RS 2.7 is lower then this and it's even worse on the SC 3.0?

I'm thinking about a 3.0 (built on SC base) Keep the Nikasil cylinders but with higher compression JE piston, twin plug and MFI ?!? I like the quick reving of the 2.2S but I need more low end power to drive around...

Thanks for your help !