gas tank from an GM A- body

[gmc1971harwich]

hey guys i was wondering. I also own a 67 GTO ( il try to get some pics of it) anyway i was wondering if i could use a gas tank like the one on my GTO and mount it between the frame rails. i know id have to move the rear crossmember. on that tank the filler neck comes out in back of the license plate. the plate flips down to reveal the filler neck. Has anyone tried this on their truck? i saw it on an episode of Trucks on spike but they never explained what fab work went into it to mount it. talk to ya guys later. il try to get pics of the steering column too on the engine compartment side tomorrow. tonight i sanded and painted the underside of the fleetside bed i found and estimates for sandblasting the frame.