I'm gonna ask a question on this thread, since it's on rear axles: The guy gave me the drive shaft back from the PO he bought it from for my 69. Problem: it is a sq. bolt on (with carrier), no tourqe tube. Is it a late model GT? a Manta? I can steal the one off my 71, since it's gonna get a V6/T5 combo and axle change, but I'd rather find out what I got.