Gm disc brakes will widen the front track 3/4 inch per side, thats `73 to `87 trucks, up to 91 on suburbans, using the newer style `88 on up modular style only 1/4 inch per side, the later modular you`ll need to purchase the kits from the vendors. Its not the crossmember that widens the track just the spindles.
just for clarification, `63 to `66 you donot need to change out the entire crossmember, just use the `73 to `87 ball joints, with the donor spindles and brakes, master and or booster proportioning valve and lines all on your crossmember and a-arms. `60 to `62 you`ll need the entire crossmember and to build spacers to make up the diffeance as the earlier trucks had a narrower frame in the front.
OK Rich I have a customer that has a 50 GMC 3/4 ton. He wants P/S, but doesn't want any frame work done and wants to keep the original wheel and column. His wife has a very hard time trying to steer the way it is. Thanks
You know Charlie, maybe just a good frontend rebuild might be in order for your customer, new kingpins, rod ends and box rebuild, just might make it easier to steer, I noted that on a 40 chevy coupe I had built back in the late sixties.