Break parts are the same for 7.5's or 8.8's. You won't want the whole rear, as you're '85 has traction loc, and the 4 pot doesn't. The rad and the e-fan are also too small for a V8. The front brakes on '87-'93 4 cyl's, are the same as used on older '79-'85 cars.
Other than that there's nothing u can use, other than the body for a v8 swap.