Master cylinder

Lotta engines I build don't have enuff vacuum for power brakes, I go with this m/c having the smallest piston giving the best "feel and pedal" for spirited drivers.
It's a straight bolt on, you may need a pushrod as the power one is different.
[URL]https://www.rockauto.com/en/moreinfo.php?pk=309117&cc=1088760[/URL]
OK I do have the push rod coming from e bay also I found out I need the manual brake fire wall plate,Mancini is my next purchase, just want to get my M/C fist. You see I have the 268 comp cam, but want more cam.dont trust vacuum cans.