I'm surprised that it required so much cutting. Almost everyone else has said it just takes a big hammer on the floor to make them fit.
I didn't even have to cut my floor to install a 2004R, but it is much smaller that the GV unit especially in length. I did cut the cross-member and welded a 1/4 inch plate about 3 inches wide and 2 feet long that I heated and shaped on top of the floor above the cross-member. It was hard to bend when red hot, so its pretty ridged cold and you can't see it under the carpet. I welded the entire cross-member solid to the floor pan.
View attachment 1715691023