If I might suggest...
When you buy the floorboards, wear your boots with the highest toes (i.e., from the sole to the upper material). Have the shop that is mounting the floorboards adjust the shift and brake pedals such that your boot toes can slide under the pedals, plus maybe another 1/8 inch clearance. This will give you another couple of inches to slide your foot forward along the boards when you want to streach out your legs.
