[pheengurs]

thanks for the pic, that helps!

I did some more reading on brake parts in general, and found explanations of master cylinder bores...not what I thought they were, obviously... the bore is inside the cylinder, has nothing to do with the diameter of the rear of the mounting flange... ok. good to know! of course, no parts place that I know of, ever measures that, so I'm still ordering parts and hoping they mate...

well, I hope to pick up my parts at napa today. I went with a new 64 booster, and a new 71 master cylinder.

hopefully they mate up without having to screw around with rod adjustments.

I think I'll take the opportunity while the booster is off, to give that oddball horizontal bracket a shot of paint, too...

here's another question for you all:

where do you have your brake booster vacuum lines connected to? back of the carb, or directly off the intake manifold???

mine's off the back of the carb, and I find it rather annoying when working on the truck because of the steel tubing and fitting required to bolt solidly onto the back of the carb... that tube always gets bent this way and that because it's in the way... I end up having to replace it every other year. a couple options would be to replace the tube with some kind of adaptor fitting so I can simply run rubber hose between the carb and booster...or block off the carb port, and run the booster from manifold vacuum...

what say ya'll?