You're probably going to find that 4" backspace will cause tie rod clearance issues, especially if you're still using the stock style tie rod. a 3 1/2" backspace would be better. With the disk brakes, you will need a wheel with a shallower drop well to clear the calipers. Best bet would be to contact one of the aftermarket wheel suppliers, such as Wheel Vintiques, to see about getting a set made in the diameter and backspace needed with the clips to fit the original caps. Late model Chevrolet 6 lugs wheels will have far too much backspace to work.
