Four trim levels, three cabs, four weight divisions and two bed lengths are available on the 2008 Ford Super Dutys. Regular Cabs have an 8-foot long bed; SuperCab models add a rear seat, seating up to five or six, and are available with a choice of a 6.75- or 8-foot beds. The full-size five- to six-passenger Crew Cabs also employ both bed lengths and offer single or dual-rear wheel (DRW) 2008 Ford Super Dutys. Virtually all available combinations are offered, except for these: the FX4 trim only comes as 4WD and is not offered in the F-450 line, and King Ranch comes only as a Crew Cab. Engine choices run from a 5.4-liter V8 gasoline engine to a 6.8-liter V10 and the new 6.4-liter diesel.