I got one from CPP. I guess it's a corvette MC unit. I'm not all that impressed with the unit itself (would have liked a larger bore), but the bracket it came with bolted right up to the frame with very little modification. Works pretty well, but since I have drums on all four wheels, I have a little too much pedal travel (soft). I'm going to try adding 10lb residual valves this week, and hopefully that will help with the soft pedals.
Also, I hooked my vacuum up to the intake manifold (where the wipers were connected and am currently only getting about 17lb - a little less than optimal, but it still works. You might check your vacuum pressure before you buy one.
