I'm with Bob on the Heidt's stuff, IMO best there is. Even on the Heidt's I add a peice of 1" DOM tubing to the inside of the crossmember with the lower A-Arm bolt going through it, then a couple of small triangular shaped gussets on the inside tubing much like the gusset on the outside peice. Once the inner tubing is in place, I fabricate a peice of 10 ga. to cover the opening in the lower crossmember on the ends and tie it in to the lower side of the frame rail. A friend of mine put a Fat Man's in his '34 Plymouth, used the same procedure on it. He's been driving it for about 5 summers now with no problems.