replacement brake booster?

[kellyavanti]

Looking for a replacement brake booster, dual master cylinder combo for my Avanti. I'm wondering what bore master cylinder, since I'm going to a tandem. I typically use speedway auto for stuff like this.

[brad]

Stock was 1 1/16" but as you go smaller, the line pressure increases, and the stroke increases also. A larger bore gets quicker pedal action, a smaller bore applies more force for less effort. I had a 15/16" on mine with a stock booster, and a Mopar 4 to 2 mounting adapter. It worked extremely well.