Just spent two days at N.S.R.A.s Nats East in York Pa. over 4200 cars, saw at least 3 dz. 4 dr. from 28 to 34 and a lot 35 and older.4 doors are popular here on the east coast.If you have a nice 32, build on it. 32s are getting hard to find no matter what body style, steel that is.Mustang front ends are hot so are dropped axles with a good spring. It depends on what look you are after.