Its not that it is difficult, but that the small parts add up. The biggest hurdles for the swap was the longer studs, the oil feed bolt, and the oil lines. I had KOracing make me a custom oil feed bolt which was $$$$ but mafix came up with a cheaper solution. As for the longer studs I bought m10x1.25 threaded rod and cut them to length. Oil lines I made them from parts from summit. After gathering all the parts, turbo, d/p, etc you are half way to the cost of a t3/t4 kit or more depending on the cost of the parts you pick up. I said this before but if I were to do it again I would have bought a 7m supra turbo and had that hold me over till I had money for a t3/t4 kit.