Torsion bars the bigger the better???

you have to use sectioned “C-body” lower control arms too.

I think those guy used the an early pre c-c-body large car torsion bar stuff. Like 58-64? Chrysler or imperial stuff. There’s at least a couple platforms in there.

was trying to figure that out with the guy that owns that NASCAR based Le-Mans Charger

Yes this Nascar Mopar info is hard to decipher sometimes. What I believe is this, the Ray Nichels built B body cars used 37" torsion bars with C body sized anchors. I suppose running a bar shorter than the stock 41" made the rate higher with the same diameter. Now they also made bars LARGER than could be pushed thru the C body socket. I think the cars were built with removable rear anchors to allow the bars to be installed without removing the lower control arms. I'm assuming the cars that weren't built by Nichels also used this set-up so they'd be able to use parts from Chrysler or Nichels. The Chrysler kit cars were built using the stock 41" bar length. Some kit car bars were also larger than the stock 1.25" anchors and I believe also used removable rear anchors. I wish our street A,B, and E bodies came with removable anchors!