this was supposed to be an easy add on. well..it wasnt.
I'll throw in the details in case someone has the same malfunction as me !!
simply going to add power booster for front disc. rear drum. had 2 sets of pedals , one from a 55 or so chevy, and another from ? so, after doing all the measuring, it was apparent the 55 style was too short. so went with the other.
it was 16" long from pivot to pedal. and after research and reading post. it seemed that a ratio of 4.5 was normal for power brakes.
so, I measure down from pivot 3.5 " and drilled the hole for the booster rod connector. then it was just a matter of rewelding the connector to add some length and more thread, so it would reach.
moved the brake light switch. also, had to cut off the old studs on the pedal assembly and welded in an adaptor to go with the aftermarket 8" booster. the did a little cut and shape so the whole thing would connect to the dash.
I have about 5" of pedal travel, and about 1 1/4" master cyl. rod travel.. hope it works?!
