So I decided to keep the existing G Force X-member and modify it for correct install height and make it a true bolt in. The rigidity of this unit helped with the frame twisting that I had with my drag launches and I really like this unit for it's high HP rigidity. Unfortunately G Force does not make a T56 style member for GM's A body, but they do have one for a G body, which I studied for its differences. The existing member used with the TH 400 is shown below: To modify it, I ground off the end tabs & made some 1/4" thick 2"x 3" angle pieces 3 1/2 " wide to replace them. The new assembly with relocated angle tabs. The new ends are fastened with high strength 3/8" capscrews into tapped holes. This also facilitates the T56 magnum removal and install.