Not sure if it can rack, when I installed mine there was no way to move it side to side the fit was tight, front to back was a no brainer to had to stop when it hit frame rails, I can see out of level maybe but I couldn't have racked mine out of square if I tried, I'll finally be done welding mine in tomorrow
Jerry Tallman 69 455/4sp Windward Blue, deluxe parchment bench seat, under major restoration je_tallman@yahoo.com