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im also not trying to hijack here, but im confused about swapping these cross members. is it only to switch to disc brakes and 5 lug wheels?? im looking at a stock 66 c10 and want to put disc brakes drop spindles etc..would a cpp type kit that comes with full disc brakes and spindles go directly on, or do you Need to swap the crossmembers still..im trying to learn all these mods still. thanks