your dyno temp logs are mentioned in this post ->
https://www.fordxr6turbo.com/forum/topic/95767-puffwagons-territory-adventures/page/12/?tab=comments#comment-1699675
take out both and see if the drivers side fits in the passenger side first...
then try disassembling the actual frame from the seats while they're out and swap the electronics etc... it'll take some effort, but sounds like you're willing to put in such effort.
Iirc the trans would sit at about 75c. I wrote the numbers in this thread a while back if anyone can be bothered finding them. Yeah I got the rubber thing still but it's on the shelf atm.