Keisler 5-speed conversion on Early A-body: Install has begun

So does someone carry the tko 500 notched were Daves tko 500 is notched to kinda clear the torsion bar/cross member mount, or Would I need to notch it myself? I do have some fab skills (I made my oun radiator brakets and welded them to my radiator support), but Id be abit nervous cutting up a new transmission. Is it hard to do? Also what about the cross member, do i have to make one from scratch?