I am working on my 73 power wagon and I have got a hold of knuckles out disc brake setup out of a CAD 80's truck. So I have a couple questions regarding the swap. I think I just use my inner axles right? Obviously there is no way I am able to use the cad axle. I also need to know if I need a disc brake master or if it is a proportioning valve that would need changed. Any other tips would be appreciated.