What crossmember for 4l60e in a second gen?
Jakes Performance perhaps
http://www.jakesperformance.com/Home_Page.html
Performance Transmission Center has them pre-made. (Raptor X)
http://www.transmissioncenter.net/highperflist.htm
If you find one you like keep us posted, I'll be looking for one for mine here soon.
Also, may have to slot the mounting pad on the crossmember for the tranny mount bolt. Depending on how far the motor is moved back, you might need to extend the pad by welding on a longer plate. Hope this helps. 

