[66-PMD-GMC]

You know, I am not sure of the make of the pump I have now but I have used several pumps from different companies.
I bought the pump on my 66 at Checker/O'reilly. ( http://www.oreillyauto.com/site/c/home.oap )
I know it was universal and not an expensive race application pump like the one I fuel my prostreet with.
I believe I had $50 or maybe a little more into the little booster pump as I call it.
Oh, and when I was having trouble with vapor lock last summer, it helped with that too.
(the reason for the vapor lock has since been fixed)
I just remembered too that I believe I used a Mr Gasket brand on my 70 lemans.
I would think a way to check if the pump will work is if you can blow through the pump when it is off, fuel will go through it too.
Frankly, It never occurred to me that the pump might not work when it was off. It always has and I have used a bunch of different pumps this way. I guess ignorance is bliss with me. LOL