Hey Everybody, I am going to buy a wheel kit disc brake conversion kit for my '67 skylark. I am going to try and save some money by leaving it manual, and getting a new master cylinder from O'reillys, since my uncle works there and can get me a discount. The problem is that the only master cylinders that they have listed is for front power disc brakes or manual all wheel drums. My question is: Is a power disc brake master cylinder the same as a non power one, and can it be used without a booster? Also, where can I get a proprtioning valve for disc/drums that might possibly fit in the stock location? Thanks for your help! -Clay
I have a 67 Buick Skylark also, and I converted front drums to front disc. The disc brake master cylinder has a shorter push rod between the pedal and master cylinder. I took one out of a monte carlo I use for parts. My stock proportioning valve block is still in place, and has yet to cause me a problem. The disc brake master cylinder also has a larger brake fluid reservoir, because the disc brake pistons are huge and use a lot more fluid that the drum brake wheel cylinders. -Josh
Hey, thanks a lot! So did you convert to power disc brakes or did you leave it manual? How much better does your 'Lark stop now? Sometimes (In the rain, ahem...) these four wheel drum brakes really have me holding on white knuckled!:laugh: Anyway, thanks for your help. Nice talking to you! -Clay Westbrook
Mine came with power drums all around. They stopped great, until you hit a puddle. Then it was anyone's guess as to when it would stop. I used 72 Skylark disc spindles to do my conversion. But my wife has a 65 El Camino, and it came with a single master reservoir with manual 4 wheel drums, and I converted it to power disc. I ran into a few snags but nothing serious. When I swapped from the drum master to disc master, it totally changes the way my car stopped. They were almost touchy, like too much braking, but the reservoir was meant for disc brakes. Don't quote me on it, but I theink the disc brake master cylinder has a bigger bore to push more fluid when stopping. It's totally worth the swap. -Josh
