titanium wrap is newer than the stuff I used on my 68 Camaro so I can’t say specifically but in my experience wrap tends to hold in moisture. It’s likely a small issue if you live in drier climates. I know @Briano is using it on his truck now.
FWIW I have a downpipe blanket being developed now.
@george.arnold there are a few stacked tolerances there: headliner to block, block to arm, arm to wedge, wedge to mirror mount, mirror mount to physical mirror. If you are seeing shaking it means something is loose. I would check one by one, starting at the headliner, to see what is loose.