[pheengurs]

64fleetside, is your 80's C10 master cylinder the all metal kind or the kind with the plastic resovoir? is it an early 80's master cylinder? feel free to post a pic of your setup here...

how did you get them to mate up?
did you have to mess with the rod between the booster and the master cylinder?
do you have that same horizontal bracket, too?

the master cylinder that's stock for 1987 setup that I bought to match the corp 10 axle & brakes is a plastic kind. I just checked the rear of it, that's supposed to go into the front of the booster -- and it definitely won't fit on the stock 1964 booster. I compared the ends and not only is the diameter of the 'bore'??? too large, but the depth of the 'bore'??? is too shallow.

in the post I quoted earlier, Joe321 said he's got a master cylinder from a 1971 and a booster from a 66. But no further details...