I tried to mount the shoulder straps as high up to shoulder level as possible and even tack welded the bar and tabs and mocked up everything. I got in the seat and in normal driving position with the straps tightened as much as possible you could still stack two of me between the belts and the seat. Yeah I’m a skinny little puke just like your thinking.
So the only option in my mind was to tighten everything up and place the bar as needed to take the slack out of it.
I just got off the phone with Corbeau, the story is this: They recommend the mounting of the bar nearest the shoulder height for impact purposes. If you cannot mount it shoulder height you should mount it as far back to absorb the impact shock. If you’re not concerned with frontal impact at speeds then the only thing to be concerned with is the strap falling off your shoulder, which is why I ran the straps through the headrest supports.
Now Pauly383 maybe what you were trying to tell me is this: They also stated that if strap length is a problem you can cut the strap where sewn into the adjustment ring as needed. This was not in their instructions and certainly not my first inclination – cutting new seat belts just seems like a problem waiting to happen.
So I’m planning on modifying my whole roll bar system into a cage so all this is academic and will remain until that time and if the “real money” for my build is available.