a buddy of mine had some on his truck... they will fit in the frame rail.... bt they do make a lil mpre work on the firewall when you body drop it..... if you were ever gonna go that route.
I AM RUNNING THE LONG TUB HOOKER HEADERS ON MY DUALLY. THEY DONT HANG BELOW, BUT MY FRAME IS 'Z'ED 1.5". BUT I DO NOT BELIEVE THEY HANG BELOW THE FRAME.