I am using a 2nd row Escalade seat.
http://good-times.webshots.com/photo...99708909vsKOGt
I opted to do without the adjustable parts as the seat backs will both fold forward to access the back where the gas tank was and only my son and I will be driving. We are both 6' tall and the truck is small enough that someone shorter could manage the petals with a small pillow at their back.