You could always have the seat pan removed, chopped and reinstalled. The power seat should still go high enough to compensate up for "normal sized" folks later on...
2006 Legend Lime Mustang GT/Manual Trans
/some mods(tired of updating) 13.257 @ 109.36 on stock 18 fanblades and stock BGFs wth CAI, tune, UDPs
1967 Lime Gold Galaxie 500 XL/390 4bbl/Toploader
1966 Mustang Coupe/bare metal (rebuild in process-slowly)/engine&trans