Your true to your point fordman. But the reason that oldsmobile was having a hard time keeping 307s in their cars during the late 70s was due to overwhelming demand. This actually lead to a NYC taxi company having a lawsuit. On the other hand though, Caddilacs have been seen with the Oldsmobile 307. Pontics had the 403. I guess the reason that GM compressed all their lines onto two or 3 motors was costs. Seems kind of impracticle to keep three 5 litres, 4 or 5 350s and a variatey or other 6s and 4s. But at least they made some amazing motors