As Nick says NOTHING FITS, MX5 seats are too high a seat base at 6ft 5 I have no chance Gt Spit seats work. I had a pair of Kirkey aluminium race seats in my EFI Gt very thin high density foam padding near the floor but the seat width to acomodate my lard arse created fitting issues had to cut the alloy in the seat corners and beat the rear inner corners of the floor pans to get them in the Gt. Getting in and out of those high sided seats another issue NOT A PRETTY SIGHT. ( Crawl in, Park arse, Roll out. ) Having a buggered back not helpful either.