I agree with making a new, beefier crossmember and calling it a day. the factory one is tinfoil. You can use angle iron or plate steel. Personally I ended up making a new rear bumper and just welded it straight to the rear frame horns. My rear bumper IS my rear crossmember now.
92 YJ. High Output 4.0L
Rubicon Express 4" Lift Kit, 2" Body Lift,15x8" AR 767s, 35x12.50 Xterrains, Home Made Snorkel, Sanden OBA, Home made rocker gaurds. 8.8 Rear with Discs, 4.10s F&R, ARB rear, Detroit EZ Locker front, WarnM8000 with Viking Synthetic Line, Beadlocks, Tons of Mods
Score: 682RRv1.0 with a BOA of 13.47
I'm now doing custom bumpers and lift installs in So-cal