Brake pedal problem

[jds319]

We've hit a snag in our project. Long story short, we test fit a power brake booster and pedal assembly from the clip car (a 1979 Pontiac Formula Firebird with rear drum brakes) without problems. Later, we added a 1980 Trans Am rear disc brake rear end. Well, when we went to hook up the 4-wheel disc brake booster from the Trans Am, it was incompatible with the pedal assembly for the Firebird.

Apparently, the two wheel disc cars use a smaller brake booster and have a different fork connection to the pedal assembly.

So now I'm at a loss. I can either dig up the pedal assembly for a 4-wheel disc Trans Am (sounds really difficult), or try an aftermarket pedal / booster assembly. I have no idea where to look on either front. Any help y'all could offer would be greatly appreciated...