Then attach the new assembly to the new seats. This is a shot of a washer stack I used to meter the hieght front and rear, took a little bit of trial and error - you will find that the adjustment lever works a bit differently once you have weight on the seats, so you need to put the seat in and sit on it to test the increment of spacing. I went with about 4 or 5 in the front and a couple in the rear. Again it takes a bit of time but nothing too great.