Is this Ididit Universal lower bracket by chance one of the firewall/kickboard mounts you tried? headscratch

Maybe let us know which ones you've already tried and we can see what else might be out there to try? wink

In the meantime, I'll see what kind of "boots" might give you something to work with.
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~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)