Quote Originally Posted by Mykk View Post
MSD 6a

14"
That would be about the Vacuum I was thinking it would pull . And that MSD Save's the day on street Driving Load up . Also carb tuning need's to be just right . I have a 355 with 10.75.1 with a Camshaft Like the Comp 280H . It's ok at Idle Timing and Valves set just right . Still need some more carb tuning and I run an HEI that will soon have an MSD 6A added to it . Still going for a bit more vacuum through fine tuning . Do you have Power Brakes on your Car ?