I used a floor mounted tilton for my GT40NZ, but had to modify it to fit,,,,as you will have to do with most.
My yellow GT40NA car has an authentic "champ/Indy car" gas pedal, and the brake/clutch are tilton floormount, like my NZ car has.
The new "Premier GT" comes with a fully adjustable competition style pedal assembly with a dead pedal and accelerator.