you WILL have to cut the firewall a good 6-8" into the cabin if you plan to not cut the supercharger case. You basically need to cut the supercharger case. I have a topswapped l36 in my camaro with a gen v. good luck if you haven't figured out any of that part yet. Everything else is easy compared to that. The supercharger basically hits the firewall where a throttle body is supposed to bolt on. so good luck.