Still have the originals on my 63. Currently trying to sort out driveline angles and need to get the stance where I want it before I can proceed. It has air shocks on it currently and I want to put traditional shocks on it (TBD) so the question is how much sag could be expected after 56 years of sitting on one's ass? I need to get the back end up about 1.25-1.5" so has it sagged so much after 56 years that I could put, say, a multi leaf setup at stock height and gain that much lift? or should I go to a new spring with an actual lift amount?