A500 crossmember mods from inside?

Yep, I'll be doing almost the same thing. I've already done the cross member mount but have way too little clearance in some places so I've got to do it from the top.

What I did initially was to cut the vertical pieces off the loop and weld in a flat piece. That got me all the clearance I needed at the top, but the sides are way to close and I'll have to slope the floor more to get it away from the sides. No pics yet as I'm too A.D.D working on 12 things at once, but I'll have to tackle it sooner or later