I'm sure they grey primer dipped all the cars up past the rear deck, but left the top out for less bubbles in the process. The inside of the frames on both 1968 and 1974 are still primed and rust free on mine. The car should never be driven on salted roads, so I moved west.
The 68 was driven only in the Bay Area, to the refinery in Richmond, from near by, and to Raider games in Oakland.