Hey if you finally see this, I finally got around to installing a couple months ago. I picked up a 7" dual diaphragm universal unit off ebay. I thought I was going to have to open up the mounting holes but it bolted right upto the stock location. The only problem I did run into was the master cylinder, I had to go with an early unit ( I think 81') that I got off rock auto. I have yet to drive it and see how brake pedal feels.
