Dennis, the way I installed mine was to have the seat pan removed and worked on a carpeted floor to prevent marring the paint on my pan. I followed the directions that came with my cover and it seemed to workout fine. I had a helper when I installed mine and used a rubber mallet to help secure the black trim. The first time I installed my seat pad I started at the back top of the seat. Find the center of your trim and roughly gauge the center of the seat, keep the fabric tight as you install the trim. Work both ways evenly and pull on trim as you go so you will have enough to meet in the center of the front. I found the front corners to be the most difficult and had to redo those areas a couple times to get it to where I liked it. The second time I installed I used trim off a 69 140 seat and started in the front center so I would be sure to have the trim centered for the metal clip that goes with that trim. Both ways seemed to work equally well. I think the biggest tip is to keep the fabric tight and redo those areas you don't like. Hope that helps.