Shoulder Harness Position and Routing

I ran into geometry alignment issue when trying to route my shoulder harness in accordance to the NHRA rules. With the harness attached to the crossbar, the slot opening in my seat for the harness is 2 inches lower than the cross bar. Due to my height, I can not raise the seat without my helmet hitting the roof. I can't lower the cross bar because it would be greater than 5 inches below my shoulder. With all that said, and not wanting to change out the seat, is it allowed to run the shoulder harnesses over the shoulder ledges of the seat? The car is a 71 Demon that is for track use only. In my neck of the woods I'll mainly be running 1/8 mile. Being a new build I don't have exact time and speed, but I'm targeting mid to low 7's.