doesnt seem to hard, although i will be going the easy path

( early a12, original 4speed) anyways what brakes is suitible for a midly modded a12?? Im after something like the Sigma conversion, is this hard? is there any other alternative (besides 1200 brakes and expensive kits)?? and whats this i heard about 1200 rear drums?? (i know theres alot to answer to