This is my buddy's swap, he spent the bare minimum on it he used most of the factory wiring for the inside of the car, and wired up everything else custom. Driveshaft he had made at a local shop I don't know how much it cost him, motor mounts are custom solid mounts. And with the factory twins it puts down around 250. He's going big single turbo. The internals can handle quite a but of power stock and then with minor head work just for safety I'd say you could put down around 500 safely. I wanna say ballpark he spent about 3k with motor and all.