Not a coupe seat as they have a metal seat pan and wood sides. The roadster seat has a wood riser and a fixed back with a cushion that lifts off the base. I took mine out and put a coupe seat in and the back is now several inches lower with the coupe seat.
I still have my 36 cabriolet seat frame and cushions. I made a new back section out off square tubing instead of the wood. My seat cushion in back was higher than the one I have in there now (1938 Ford)