This is Kurt, the person Steve was talking about.
The clutch cable bracket had to be shaved at the bottom for the bracket to fit. Ideally, find a single diaphragm brake booster for 15/16" rims cardone part number 503173 (with master cylinder). The problem is this booster seems to be R&R only. You can use the buyers guide on rock auto to find applications for that booster to find one in the junk yard. I had to pull one out of an 89 Aries.
You will be able to tell if you will have clearance issues if the booster is a dual diaphragm. These boosters are larger in diameter and aren't molded around the booster check valve and master cylinder mount. They stick out towards the two holes for the bracket on the driver side strut tower, and look more like a perfect cylinder.
If I remember when I get off work, I'll post pictures of both boosters.
Good luck!