[john]

I put the seat in the cab, and measure for square and mark the holes. Then pull the seat out and measure the marked holes and transfer to underside of the cab, to make sure you aren't going to drill through anything you don't want to. Make sure you have room for reinforcement plates on the bottom. Sometimes you might need to slide the adjuster one way or the other to get a fit. as far as thr jump seat latch i can't help.