NHRA Stock seat and belt setup

[JP]

If you want the 5-point belts to work as they are designed to work is it important to have the 5-point routed directly downwards or at a maximum of 20 degrees forward. Only way to do that with a stock seat is to make a hole in the seat.
If not done properly will you submarine when having a frontal crash.
Using Stock seats in a race car is nothing but stupid, but the rules are as they are...