Brake mods??

Depends entirely on your car’s set up. In 100% stock form the rears tended to lock up first, yes. And in that case changing the wheel cylinders can help, there are 15/16” and 7/8” bore wheel cylinders.

But if you run a staggered tire set up with wider rear tires, things change. If you alter the ride height, things change. If you run different torsion bars and springs than stock, things change. If you’ve done anything to change the weight distribution, you guessed it, things change.

So what I’m saying is, you should probably check your car before you start throwing parts at it. And if you’re really concerned about it, just plumb in an adjustable prop valve, as that will allow you to dial it in.