Yea, 73 Swinger
Actually it's not the crossmember per se, but only the loop of it that goes over the top of the transmission.
I have super tough frame connectors welded right next to the torsion bar sockets, so between those and the trans crossmember I'm sure it fine.
Actually I've got a couple of cores, only one is an RH I think. At least one is a 518, but one is a smaller series. Of course FIRST I have to get the REST of the 67 back together
The 518 would be one for floor mods I think, from what I have seen.
The A500 came out of a 230 or so hp pickup and has a fair tow capacity also, so I figure in a vehicle 1000 ponds lighter it should do pretty well.
My opinion anyway. :D