Ok I just picked up a 3/4 ton booster and master cylinder off a 70 pickup with disc brakes. I want to intstall it on my 71 1/2 ton with disc brakes. Do I have to use the 3/4 ton master cyl or can I use the "new" 1/2 ton cyl that is on my 71? Also what about the proportining valve? Will the one on my 71 work or do I need to get one for a 3/4 ton? Anything else I need to know for the swap? TIA.....
