Dumb idea or ?????????

You don't even need concrete. I bought a used two post and built an "H" frame out of 2x6" tubing for the base, with two 2x6 tubes running under the center, and 2x2" tubes running up for diagonal support.

See my post in this thread

http://www.forabodiesonly.com/mopar/showthread.php?t=135205