Here's what I got for measurements,
I placed a leval on the front edge of the seat, and measured to the floor (flat part, just in front of where the floor steps up for the seat risers). From the floor to the top, front edge of the seat, is 15-3/4". And the lowest part of the seat (at the back, where you butt would be) is 5-1/4" lower than the front.
I have a pic of where I measured from, but left the camera in the car, I'll go get it in a little bit, and post up the pic.
maroon 1987 Grand Wagoneer. stock for now...