This is an ancient thread but for the sake of congruity it's worth an update. I have a basic Patriot Sport with non-height adjustable seats. They sucked.
So today I raised the front of my seats 0.75 inches and the rear of the seats 1.5 inches. It is now far more comfortable, I have a much better view (even though I'm already 6'1") and I don't feel like I'm sinking into the seat. The pressure is even across my rear end and legs.
The bolt thread is metric. I used two zinc plated 10M-1.50 x 60mm hex bolts for the rear of the seat with two paired 0.75 inch spacers (each spacer made up of ten 3/8" flat washers taped together with a few wraps of electrical tape), and the factory hex bolts for the front of the seat using a single 0.75 inch spacer with each bolt.
I may need to move my rearview mirror up an inch since it causes a small blind spot now.
I have no guarantees on how this setup will hold up in a crash test so as always you're a test dummy if you're taking advice off the internet
