CMC/FF Body support frame question

I did the same as Carey did on yours to correct/prevent rear butt sag and top of door gap opening.

I think it's for the rear mount bracket for the CMC optional show bar.

Thanks WOLFGANG

So the roll bars on the CMC Speedsters were actually attached to the car's frame. That is much better than what I thought..

Jimmy V. posted:

So the roll bars on the CMC Speedsters were actually attached to the car's frame. That is much better than what I thought..

But where do the support pads on the bottoms of the rear bars bolt to?

According to the frame picture above all 4 points of the roll bar are attached to metal frame. What am I missing?

There are ~2x2" that it gets bolted to.  Those 2x2 aren't continuous from one side to the other - they are pieced (welded) from 3 pieces.  I'd want a solid steel plate welded at the bottom to tie those together. I would also want the behind door brace brackets to be triangulated with steel down to rear support.  I'd also want some grade 8 bolts with lock washers.  Otherwise, it turns out to be a big mousetrap.  I can also see those posts behind door acting to help in a T-bone accident (but surely not by a F-150).

At best, and I have a CMC roll bar in my car, if you ever roll your car over, this bar WILL collapse towards the rear because the force vectors on the rearward supports are all wrong and will bend sideways and simply collapse the bar.  There is a strong possibility that it could collapse forward, and you can surmise the damage THAT will do.

OTOH, if you roll a Speedster without this roll bar you’re probably dead, anyway.  The body is nothing more than a fiberglass egg shell and would not provide much protection.

My response read "it is attached much better than I thought" not that it was going to hold up in a roll over. My concern,if I ever installed a show bar (note the name implies it is for show) is that if I or someone else were to use it as a support while getting in or out of the car or use it as a push point to move the car, that the bar would rip out of it's attachment points. Thank you for myself and all others who may install or have already installed a non roll over proof show bar.  I and we again have been properly warned. The world is safe once more. The Anti- show bar brigade can for now rest easy. Amen.

My Kubota tractor has a better roll bar setup than my CMC. 

"Force vectors"? What if you're going REALLY fast in reverse? Now I got ya thinkin? 

But as everyone says, even the cheapest contraceptive is better than nothing. Let's be safe out there. 

Don't be a fool ,vulcanize your tool!

Jimmy:  I use my “show bar” to push the car all the time, out of the garage and back in.  Nothing moves at all (except the entire car!).    Nothing flexes as far I can see, so have at it.

A long time ago, I added 1”X1” diagonal supports from the top of those uprights behind the door to the horse-shoe frame at the back.  Don’t know if they did much, but they were easy to weld in......

Not sure how to convert a pan frame but I know the frame cars are all triangulated and locked together so that the body is held and the cradle made can hold a subie or a VW engine.