937 f 250 sd 4x4 diesel there is about 8 " of clearance under the seat. they don't make them like they use too. i only wish it had 4.10 gears, until i am at the pump lol i know its why i can crack the upper teens in gas milage. Still looking for a gear venders od for it, might do a 4.10 swap after i get one. Having a 8 speed auto is great.