I pretty sure 4th gen f cars are almost a bolt in for sec gen Fcars.I have an LS6/T56 combo and I'll either use a 4th gen tank or a fuel cell and inline pump with voltage controller and some creative wiring and a little luck.It will probably the 4th gen option as the C4 corvette rear suspension will allow me to run the exhaust in a manner similar to the C5 corvette(with two outlets in the center with some body mods that resemble the C5 rear fascia).I intend to upgrade the appearance to a slightly more modern look in some areas.There is a 71 pontiac firebird with all 4th gen rear suspension and driveline including the tank that was posting on pro-touring .com and you should be able to find it at
www.extremefirebird.com/Home.html