Crossmember brackets

is the crossmember tack welded on the two tubes that go inbetween the mounts already. I just put a c-4 in my 85 and i had to grind the tac welds off then scoot the crossmember all the way forward then tack the cross member on the tubes again. I dont know if you have tried that or not but if you have then you have to cut the mounts and move them back.

The '79 mounts are too narrow and too far forward. I fabricated a mount from
2" square tubing and the round (bushing) ends from the old cross member and attached a bracket in the middle for the trans mount.