[John Brown]

I used to buy the "then current" GM production in the 80's for some cars I worked on, and they looked much like the one you bought. Sometime late in 1969 production they went from the flat bottom to the ridged bottom and then the 70 Chevelles also used the ridged bottom cleaner, but with a different flat metal ring for the Chevelles instead of having the oval ring that the Camaros used. The vent tube on yours also looks to come out at a slightly different angle. Is your vent tube bent with one 90 degree bend or two 45 degree bends?