I cut 90% of it all away and left enough to locate the box and weld it in, but I have cut it all away and welded in the mounts on spacer plates to get them in the right place.
I think that the fella who welded up your motor was paid on day work and dragged it out as long as he could, either that or he just had no idea what he was doing LOL.
I am going to do bulk cuts on the passenger side and gut the whole lot out, slot the box in and weld it up to the door posts and then plate the floor back in.
Oh sorry yes I did same re spacer plate