Hello. My first B-Bodyforum post (been on FABO for years). I have a '71 Charger SuperBee in the shop and the owner would like to do a 6.1 install. Other than the obvious fuel and electrical work, is there any firewall, tunnel, etc mods that need to happen? I would hate to do all the body and paint only to find out I need to notch the tunnel. Thanks!