Brake upgrades for 1974 Grand Prix

[TQuillen]

Good evening -

This is my first post in the technical sections, so be gentle! LOL. I've got a 1974 Pontiac Grand Prix that I'm in the process of updating from a driver into something that can be autocrossed quite a bit, but it'll still be primarily a street car. The car currently has factory brakes, 11"x1" disc front, 9.5" drum rear. Bolt pattern is 5x4.75", wheels are currently factory 15x7, to be updated once I figure out brakes (although I'm leaning towards a 17" wheel). The car is heavy, 4300 lbs with me aboard. I'm sorta on the fence about what direction to go with the brakes. Budget is certainly a concern, but at the same time I'm not one to spend good money on the wrong parts. I'd like to do an OE based swap/upgrade if at all possible, to make replacement/maintenance parts easier to get. I've identified a couple of options that I'll list here. Please let me know your opinions, as well as any other options that I might be overlooking. If there are somewhat budget friendly aftermarket kits that will work with this car, I'm certainly all ears.



Option 1: Stock 11" fronts, upgrade to 11" drum rears and let it ride

Option 2: Stock 11" fronts, upgrade rears to S10 Blazer discs

Option 3: Convert front and rear to LS Camaro/Firebird type discs and calipers (which definitely pushes me into a 16-17" wheel)

I welcome any/all thoughts and opinions! Thanks!

Travis