disc swap 74 into 69 c30

[jdean]

So I'm having a hell of a time finding a backing plate for the 69 drum setup so i'm looking closer at throwing the disc frontend from the 74 I have into the 69. Both are c30's, I think the front of the 74 has the smaller rotor setup on it, the wheels are pretty flat, not dished. Main question is, I have a new 69 master cylinder and brake booster (painted it so I can't return it) and was wondering if I could use it with the disc brake frontend if I used the valve that is in the 74? There is what looks like a proportioning valve on the 69 already right up by the master. The 74 has both sets of lines going right down to the front crossmember to a valve mounted on it. I have also put the rearend from the 74 into the 69. I know i'd be best off to just put the 74 master and booster in, but I'm trying to do this on the cheap. And already have the new master/booster that i'm stuck with. Sorry for the long post. Thanks in advance. I'll try to get pics today