[175K911]

I applaud your ingenuity.

Obviously the prefered method for any mount is to use the factory threaded bosses where possible, they're the strongest part of the car. I've got an '86 as well so know full well that the only threaded location is the two outboard spots.

On the inboard locations, like john rogers I'd want to know how the eye bolts are attached. Do they go through the new mount and through the tunnel? If not, I'd be concerned about flex on the bracket you made. You're transmitting the load quite a long distance from the eyebolts over and down to the floor. I've always just drilled two holes in the top of the tunnel, right under where you've got your eyebolts. I use large flat steel plates underneath the tunnel to reinforce. This is the same location that the factory used to attach the inboard seat belt receptacles for decades, until they switched over to the receptacle attached to the side of the seat. I've seen a 911 that had rolled and those inboard eyebolts mounted as I've suggested that didn't even budge.

My interpretation of the PCA Club Race rules is that anything that attaches to the seat frame or seat rail is not allowed. So the cross bar in your system wouldn't pass tech in my mind. Are you trying to avoid drilling 2 holes in the floor to mount the sub belts?

As a temporary solution for the shoulder belts on the roll bar, you can get a couple of 1.75" muffler clamps and put one outboard of each belt. Just make sure you point the threaded ends toward the rear of the car. Not elegant but it works.