Warren:
I too am installing 2 point seat belts in my 40. I found that when installing the floor mounts be sure to drill the holes in a location where you can reach the nut with a wrench. For instance, you don't want to drill into the frame, muffler or floor rib. However, I figured out a way so that one person can install the floor hardware without a helper. Also, found a vendor who sells long 3 inch wide 2 point seat belts instead of the regular narrow width size. If interested, PM me and I'll share it all with you and all Fordbarners. Do not buy 50 inch long belts as they are too short.