I think they reproduce the manual transmission floor hump. If you either have a hump or buy a reproduction, they basically fall into position. Once in position, you can determine where to cut the floor.
The floor is already opened up but I think the previous owner who started the project cut the hole for a bench seat stick in stead of a hole for a bucket seat car, which is what the car is. I may have to patch the hole to make is smaller.
