Fix for Cowl Shake and Body ?

I have a '68 Barracuda convertible that I welded in the full US Cartool Chassis Stiffening Kit. I made a huge difference, but I still had a bit of the cowl shake left. It was most noticeable around town.

When I still had the Slant 6 under the hood, I made a Monte Carlo bar that tied the cowl and fenders together. It consisted of 3 tubes that formed a triangle and attached to several of the inner fender bolts and the pinch weld above the wiper motor.

This Monte Carlo bar stopped the remaining cowl shake.

It no longer fits with the 5.9 Magnum & A/C I installed, and I haven't bothered modifying it for the V8.