Hey Doug I just put a set of Simpsons in 6025 as they are SFI approved. The rear cowl bar is a perfect height for wrapping the shoulder straps around. It puts them right across the shoulders and 90 deg to the spine. I used the nice trim plates for them from Finishline.
http://www.finishlineaccessories.com...roducts_id=228 I attached the submarine strap with a spacer to the steel channel for the sidepipe hanger as it is welded at both ends to the frame. I have some pictures I'll e-mail you. The roll bars are typically 12" on center but according to the Simpson install instructions those crossbars are too high. Patricks look like they are at the same height as the cowl hoop.