Gauge I have isn't GM spec. Neither the original not the aftermarket one. Not sure what's going on with that but it's the generic aftermarket range, 240E/33F.

Well, I found the Mopar version of the fuel gauge on sale for under $18 delivered. Can't really beat that price. Anyone need a new Autometer Old Tyme Black fuel gauge (240E/33F) with matching 5 bolt sender?