Out of curiosity what is the outside width and the height of the seat back that would be ideal for the Sammio? At what angle should the seat be mounted?
When I started to build my own cars I couldn't find a seat that fit me or the low position that I was looking for. So, I took a mold of my bottom and lower back from expanding foam then made a fiberglass plug and made my own seats. I made mine with a 20 degree lay back. I had covers made so that the center section on the bottom of the seat hinged in the back and hooked to the front with velcro. There is a small pull tag. Most of my cars don't have doors either. I can pull up the upholstery and step into the fiberglass seat then slide down into the cockpit. This keeps me from having to step on the upholstery.
The seat ended up very comfortable. I have driven across country several times and in one of my cars drove 33,000 miles in 18 months.
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