Hi guys ! IÂ´m new to sn95Â´s and this seemed like the right place to learn. Long story short, I have a 96 saleen that needs a new engine, it used to have a twin screw engine that gave up at 500whp. I want to bring it back to life but for the moment it will have to be a more humble set up, I have a couple more projects that are eating up my money haha Anyways, I already read a bit about the NPI to PI swap, the problem is that I donÂ´t have the old engine anymore to swap the needed part, so my question is, if I were to put in a complete 04 PI engine, I would have to change the whole fuel tank, fuel rails, PCM, and wiring harness correct??? is there anything else I would have to change like the exhaust? also, if I where to put in a 96 cobra engine, would it be just the engine and pcm or would I have to change anything else like the wiring harness, mounts, etc? Thanks for your time guys ! I will keep doing my research as I type this but any info would be greatly appreciated!