Both of those wheels will work with disc brakes, but I don't know if the one with 4.75 back spacing will work on your truck. Another member recently got some wheels with 4.250 or 4.50 backspacing and had interference issues. I know that the ones with 3.75 will fit. You should be fine with 15 x 10's in the back, but you might need to message the wheel opening inner lip a little, depending on tire size and how low you go. Keep me in mind when you need your power steering and power brake conversion parts.
