The stock mounts for any series other than D-series will not fit your car. There are no firewall modifications. It comes with an engine harness. I'm not exactly sure what wires you will need to add... The engine harness plugs in at the top of the passenger shock tower and that harness it plugs into runs to the ECU. This is just a guess, specific information needs to be obtained from people who did the swap personally. Search the internet for swap guides... it has been done before.