I am almost certain that somebody has already asked this question, but is there any issues with the rear proportion valve in the Rampage and Scamp when upgrading to the disc brakes. I saw that somebody already was asking about the 5 lug upgrade, but I already have gone and gotten the 5 lug upgrade and I have the largest drum on the car already and the engine is still a little strong for the setup. I also have the brake upgrade for a 91 Shelby Z with the vented rear brakes, note that for the rims, this is a very tight fit, but I was just wondering about the rear valve. I know on a lot of the SLH package upgrades talk about how it differs on the L-body trucks from the cars. I would appreciate any help that can be given.