Magnum or Cordoba body type

So my 56 Chevy truck has a Chrysler cross member kit made by Gibbons. I used a 77 Magnum front end parts. It was supposed to be 75-? Cordoba, but when I went to the wrecking yard, I liked the Magnum parts better, ie calipers and caliper holders. The parts fit so there. So what is the body type of Magnum and Cordoba. B, E ? I need to get new torsion bars but don't know what to get.

Thanks

Luis