[mickmate]

The rear hoop in the CSX is 1.25" diameter heavy wall tube. It is better supported in the frame work of these cars than the rollbar. There are triangulated tubes holding it in, out, back and forth. It is the strongest place and best height to attach shoulder straps to in these cars. The sub strap could be attached with a plate between the front seat bolts but by the time it is beefy enough it will start increasing bolt sizes and get bulky enough to change seat height at the front. I installed one on the channel for the side pipe hangers. It is a C Channel shape welded between the main and the outer frame rails.