4150 MW intake choices are slim. Indy is about the only game in town and I doubt it will fit under a steel hood.

MW heads on 500 inch short block will give you peak power around 7000 rpm. You might be able to find a hyd roller cam setup that pulls hard to 7000 but I doubt you're going to hit on that combo the first time out unless you work with an experienced engine builder.

I have a hyd roller in my low deck 512 and it pulls hard past 6500 rpm but I haven't spun it to 7000 rpm yet. It might do it and it might not. Valve train stability is a bit of a crap shoot for average folks who don't have access to a spintron.