Quote:
Originally Posted by nytrainer
I have complete disc brake front end (uca/lca, spindles, rotors, calipers, etc) as well as brake MC and booster. I believe this complete setup from ‘70 Monte Carlo. It has round (same size) control arm bushings but was under impression 70 and newer used oval bushings?
To use this setup on a 70 Lemans that has manual drum brakes what is needed to complete the installation? I realize brake lines but what about distribution block. Doesn’t appear to have had a hold off valve mounted near the MC like some of the aftermarket setups use. Keeping rear drums too. Is there a way to date these parts?
Lastly, being a single piston caliper would original 14” rally 2 wheels from this 1970 Lemans clear. I realize there were different wheels for the 68 4 piston calipers but thinking by 70 factory wheels would clear both drum and disc brakes?
Thanks
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Multiple different ways to go for front to rear proportioning on a front disc rear drum setup.
-stock 70 A-body disc brake setup with a reproduction hold off valve under the disc brake master. '70's also used a small brass valve (resid pressure(?) on the front of the frame crossmember where the rear end hose attaches.
- '71-72 A-body style stock disc set-up, uses the first integral proprtioning valve. '71-72 disc lines can also be configured with that particular style prop valve or a brass replacement style which mounts under the disc brake master cyl. Have gone that way many times plumbed with a disc/drum proportioning valve & a small steel OEM mtg bracket from a 76-79 Seville. Very clean set-up, ESP when the engine in running headers. Inline Tube has marketed a very similar setup calling it a "conversion line" setup with their small bracket.
-Adjustable aftemarket proportioning valve in line going to rear brakes. Have had numerous partscars that came in with these, often with '73-77 A-body disc spindles/rotors. Personally not a fan of either. Too easy to tamper with the adj prop valve when under the master. Often times have come across them mounted up in the unboxed center frame rail.
On the '70 rally two 14x6 wheels, they will work disc or drum. '69 drum brake A-body's can do the same, as all '69's used the JA rallyII wheel whether factory drum or disc.