I didn't see headers on the engine, thats the one 'fixed' point in the whole system and that is where you need to start from. The 'x' pipe will have to be modified and that is why the in/out tubing is generous but you can't do anything until headers on are the engine and you've cut the 'x' pipe to mate to the headers. Once those are bolted together you are off to the races, get a couple mandril bends to weld into the pipes going over the axle and it'll be 'magazine' ready.