Thoughts on Drum to Disc Conversions…

Mattax said
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 Ken'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.

Yeah I mean I don't see anything that would have huge brakes out there, but I did notice in the video that the otherwise slower cornering and accelerating 1987 BMW 325is just absolutely out brakes almost all of the cars near it, despite having downright puny 4-wheel disk brakes. Pretty wild gain in a braking zone.

Fact of the matter is, you're not out there with a bunch of vintage cars, you need to perform much closer to a modern car in today's traffic. They're not fine when you're slamming through the car that cut in front of you.

Maybe this is something with some relevant data? About the same as I mentioned earlier. Even with narrow front tires...
Upgrading Mopar Plymouth Car Brakes - Mopar Muscle Magazine