I have done the 2.3 to 5.0 swap. You dont need the brakes or k-member to make it work. You also dont need the 8.8 until 86 all 5.0 cam with the 7.5 rear. You do need the wiring, fuel lines, computer, tranny, tranny crossmember, gas and tranny cables. Be careful with going with a non-mustang...