I recently bought a set of defroster adapters that fit under the dash from Tom Myers. When I get them, one looks original and will need some sanding and painting. The other one, while the top opening seems the same, the bottom portion the hose fits on is a 1/2" larger.

I would assume both adapters would be identical. Am I wrong and there are two different looking adapters for a 1946 Chevy truck??

Dan Mascheck