You can buy a cross member or you can fab one up, but you'll need the Speedcal 2 (AKA Speedcal Extended Range) from Dallas Mustang to make your speedo work right. Install is pretty straight foward, and Justin at DM is very helpful. After hooking up a couple of wires, you drive a known 10 miles... then call him with what your trip meter says (it won't be 10). He plugs it into his equation and he'll give you the code to set on the inside of the box. This process also accounts for aftermarket gearing as well. I have a T56 in my '98 with 3.55s in the back.