flywheels

I see on the N-R website that they offer several clone flywheels. The billet, billet with adjustable timing and what appears to be a cast aluminum wheel. The cast piece is .3 lbs lighter. Would this be acceptable for 7500 rpm?

well guys im on a cleaning spree agian and need to get rid of some stuff. http://i710.photobucket.com/albums/.../Picture136.jpg Flathead bushing block, .030 over 1.250 intake valve 1.125 exhaust ported and decked trued, new stainless valves and single angle valve job, port matched tillotson...

I grew up racing 1/4 midgets and they all had the gov removed, Dad just taught us kids to "burp it" and let it breath. Never a problem. I'm not sure but I don't think we ever lost an engine? And these were not Honda's like they run nowadays they where home built Connie's and we wound them up and...