Working on gravel? Been there, done that, still do sometimes.
Your best friend is one of those metallic parts trays. Lost bolts, nuts, springs, washers, etc in gravel really stinks.
Keep some cardboard around for laying on [img]/forums/images/graemlins/grin.gif[/img]
I still do a lot of it but loosing little parts wasn't what I was worried about. I doubt that I could have moved the tractor halves apart on gravel. Floor jacks don't roll well on gravel.
I actually considered doing it anyway but decided against it. Back in the 50's my uncle had a 49" Ford PU with a boom on the back. The boom had a hand-cranked winch on it and he could and did use it to tow cars. That truck is long gone but I rescued the boom and winch from the weeds behind his house last year. I considered mounting it to my PU and using it to split the tractor.
I didn't.....don't know what I will eventually do with the boom and winch but I'll think of some use for it.