I'm getting some custom exhaust work done at a local shop soon (magnaflow resonator, 3" pipe back). How beneficial would it be for me to swap to the new style gas tank? My car is a 1990. Out of what year car can I get a gas tank out of? I'm assuming a gas tank out of a newer 4.6 N/A Thunderbird is the correct tank? Or does it have to be out of a Super Coupe? Can someone also explain how the new tank lets the exhaust route vs how it is routed now? How much should I expect to pay for a tank? Any inherent difficulties with swapping the tank? Thanks for all the replies.