And to add prototypes had been built and tested since late 64 using a converted centeroiler block and early prototype heads with the spark plugs down by the exaust not close to the intake like later production cammers. Also production cammers used sideoiler blocks and rumored production stats between as many as 2000-2500 engines built total. I have a picture of a "wall of cammers" from Holman Moody moody in 67 showing John Holman standing in a sea of cammer engines with a wall behind him packed 3 deep on shelves. If someone can post it I'll email it to them. It's pretty cool!

G.