Got a question for the early owners, I am finalizing my 72. I bought a fiberglass tub a year ago, it has the squared off center section just like the original but I have an odd fitment issue. if I use the 1/2 mounts for the extreme rear mount aka the rear crossmember ones, then the ones at the rear wheelwells are 2", the 4 middle ones are 3 1/2" and the front grill one is 2". I know from factory all my mounts were the same thickness like 1/2" or so. I have bought a set. Now, I think I can get around this by fabbing up some 3x3x3 steel perches to lift the center mounts, use 1 1/2" rubber round for the wheelwell and the grill section. My question is this, could this be a body for the pre-72 models? do you guys know if the tail section of the pre 72 frames drop about 2" or so as compared to the intermediate 72-75 frame? Im just wondering cause this is just wierd. Like I said I am gonna get around it with some fabbing I just wondered if its normal or a glass tub thats not molded right. The tub was virgin when I bought it but not new, they guy I got it from bought it on a 78 frame as a project and was going to a steel body so thats how I got it. nothing was marked or cut to indicate firewall cutout, only holes were what the PO mounted it to the 78 frame, but it is def not a 76 up tub, they have that round center section, not the low square one like mine.