I'm using a six-way power seat out of a Hyundai Santa Fe. I put it on a swiveling base -- the kind that was popular when all the cool kids drove a Chevy van with shag interior. To mate the two, I fabricated an adapter out of steel plate and 1" square tubing.
One tip: Shim the seat and/or base so it leans a little to the left -- to compensate for the road leaning to the right (road crown -- so rain water runs off). Your spine will thank you.
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