[frnkeore]

There are many different ways to resurface a flywheel but, it should be done by mounting the flywheel by it's crankshaft surface. That surface, of course needs to run true.

I'm not a automotive machinist but, I have machined many Cummings flywheels and SBC, race flywheels. I made fixtures to bolt them onto my lathe. Always checking for run out, before machining.

Over heating a clutch, can create hard spots, on the cast iron surface and if you turn them, you have to deal with that. If you grind them, it's not as big a deal.