FORD
38 frame rail (box take off)
Cab/chassis models are all equipped
with 34 frame width
CHEVROLET
2000 & older 38 frame rail (box
take-off)
2001 & newer 42 frame rail (box
take-off)
Cab/chassis modes are all equipped
with 34 or 42 frame width
DODGE
2001 & older 38 frame rail (box
take-off)
2002 & newer 42 frame rail (box
take-off)
Cab/chassis models are all equipped
with 34 frame width
2006 & newer Dodge 4 box bed
length is different.
Mega cab trucks use a different bed
than standard 84X84 the hitch
location is different