I won't fuss over it. If he won't make it worthwhile he can go to the trouble to put them on a skid and ship them. That's a lot of bother. A nice pair of Miata seats of the right color and year are hard hard hard to find.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.

[SIGPIC]
..I also have a 427 Cobra replica with an aluminum chassis.