You are going to have to trim the trans tunnel just a little bit for the L52 you don't need a body lift if you do the trimming. Everything else as far as mounts and such is the same.
Marlin suggested I use a small sledge on the floor when I got my L52 but at the time the body lift was a better option.
my current cab with the body lift was actually hammered DOWN so the shifter didnt jump out of gear