subframe connectors questions

You can whip up a channel bracket like I did.

If you use 2x3x.120 tube, laying the wide side flat, you can open the 3" side and have it slide over the rear frame section. Drill some holes for plug welds and weld your edges. There is usually a small gap at the rear because the frame section is not 1.75" tall.

Here's a 2x3 install AbodyJoe did to give you an idea.
http://www.forabodiesonly.com/mopar/showthread.php?t=132668