Not that this has much to do with the OP's decision.
I think that comes down to how much of a project and what fits his planned uses.
That said its always fun to watch how long Edsinger's Corvair stays competitive with drums on all four.
You'll have to go on to part 2 before his brakes get too hot and he need to back off a bit.
The guy chasing him with the dash cam is in a much newer BMW.
The rules are factory iron brakes, so that limits what a Corvair can use.