I was just about to post this in here. I was talking to stephen about a crossemember for my 6.0 going in my 84, and he wasnt sure, so I bit the bullet and ordered the big block crossmember. Got the motor in sunday and there is about 2.5" of room. So I figured I would let him and everyone know it will work with the big block crossmember. I am using the comp motor mounts in the stock location. I can shoot a pic tomorrow if anyone would like.