disk brake conversion with old rear drums

jetblack73nova
28th-December-2006, 10:11 PM
I want to upgrade to power disk brakes from manual drums in the front on my 73, will i have to modify my stock rear drums or lines?
I also want to replace all the front end suspension bushings and steering bushings, but i don’t know what they are all called, could some one give me a list or reference site? are there any good kits?

thank you

SuperNova69
28th-December-2006, 11:18 PM
No, you won't have to touch the rear brakes. You will need a new master cylinder, which should come with whatever kit you get, and the rear lines may not line up exactly. They probably will, but if they don't, it will most likely be a very small amount so you should be able to get them to line up no problem.

Classic Industries has a complete kit for the front end including all bushings you'd need. PST has kits as well, rubber and polygraphite if you want tighter handling.

No part numbers, but here's some links:

www.classicindustries.com
www.p-s-t.com

Matt

Mike Goble
28th-December-2006, 11:23 PM
You'll also want to get a proper combination valve for the disc/drum setup.

jetblack73nova
29th-December-2006, 01:54 PM
thanks guys!

Ray_McAvoy
1st-January-2007, 09:47 PM
Hi jetblack73nova,

The factory 1/4" rear brake line on 71-74 Novas with drum brakes has a 7/16" flare nut on the end that screws into the distribution block. If you use a factory style combination valve, the outlet port still accepts a 1/4" line but it has oversize 9/16" threads that require a special flare nut. Rather than cut the line, swap the flare nut, and re-flare the line, I used a Weatherhead #7908 adapter fitting when I swapped disc brakes onto the front of my 74.

I used a factory bracket to hang the combination valve under the master cylinder. I had to re-bend the rear brake line slightly to reach the valve. Since the power brake booster moved the master cylinder and combo valve farther away from the firewall, the rear line on my car was just barely long enough to reach. Many of the disc brake conversion kits that I've seen include a bracket that positions the combo valve in a slightly different position under the master cylinder. With those brackets, you might have to use a flare coupling to add a short extension onto the end of the rear brake line.