[Aubrey N Bruneau]

Sounds to me like the door is not necessarily closed.
Quite obviously, that one installed by that company, under the Camaro, is very much a departure from a factory unit.
I wouldn't allow it either.
As for adjustable, not allowed.
No kidding. This isn't Super or Pro Stock.
Just do it right the first time, and it doesn't have to be adjustable.
Besides, with our obsession with weight savings, why would a person want extra bracketry dangling around ? !