Mopar to ya is the MAN!! He inspired me to put a 2004R into my Barracuda. With 3.73 gear I'm running 2200 RRM at 65/70 MPH. It's so smooth and much better off the line. As for the cross member mods, here are some pics of what I had to do. Also a few pics of the shifter down rod (torque shaft) mods to keep the floor console and some pics of the home made cross member. Remember that the amount you have to cut is determined by the thickness of the adapter. TCI had the thinnest adapter so I went with them.
If you look close you'll also see where I installed (and welded) some 1/8" plate between the upper cross member and the body to reinforce the area where I cut the cross member.
Without Mopar to ya's thread on his installation I would probably never would have attempted the modification!!!
treblig
