8.5" with rear discs

[malibu80]

Sorry no part numbers. I'm planning to use a proportioning valve from a '81 Cadillac Eldorado. I like to use factory parts where I can. We'll see how that works out.
If it wasn't for having to shorten the drive shaft, the rear would be in the car. Not too sure how much I need to shorten it since I'm installing a 5sp in it.

 

[dr78442]

Sounds like a soild plan. I used a master, proportioning valve, rear calipers and rotors from a 79 seville. I had the same idea of using factory parts. Worked well on my 8.5 . Good luck

 

[84GP455]

Very nice but you are not alone,

my calipers are in a different spot than yours mine are in the back.