I wonder what the actual gain might be by using it. Maybe with frame connectors, the lower radiator U brace and the inner fender gussets, this may not help all that much. If it blocks access and you are not looking for that 5% of additional stiffness it provides, is it worth the effort?
I already have the frame connectors and radiator support welded in. I have the inner fender supports but not in yet. I just welded up the inner cowl and A pillar. I also welded up the steering support bracket that is welded to the cowl. On that bracket, with no other support that bracket would move a lot with it's few spot welds. After welding it up the cowl no longer flexed and the bracket was solid. I also welded up the K frame with the steering box support.
I'm working with a convertible so I'm trying to make the car stiffer. Yep a hardtop would be stiffer but this is the car that I have, plus I'm 6'6" so dammit I want some head room with a helmet on for once.
So this looks like something that I'm going to pass on. Thank you every body for your input.
Bob