can anyone recommend a good brake biasing setup ? i need one that puts the bias control inside the car for when im doing my burnout so i dont melt the rear brakes ...

 

Not from a first gen, but here is one for a Miata:

http://www.miataturbo.net/showthread.php?t=37313

There was someone on here (I think it was Teddy) looking to do a line lock install. It's for the
front brakes and isn't a biasing setup, but it will lock only the front brakes for a burnout.

 

regular line lock will work. but holding the brake during burn outs isn't really that hard on the rear brakes. not much pedal pressure is needed to hold the car still once u break the rear tires loose anyway.

 

I went with the wilwood valve, but I've got mine installed under-hood. Just cut the line, reflared and used flare nuts to fit the adapters that came with the valve.