first time rear end swap

My oh my how similar we are. I just picked up a 8 1/4 and will be overhauling it and replacing my 7 1/4 this winter. However I want to replace all the brakes and lines on my 75 Swinger and possibly go with PST's Complete manual disc brake conversion kit. I'm still running the stock 904 right now and stock 75K mile slant 6. Mind if I might ask if your running a slant and 904 trans?