Just to add to Pops comment, in 1966 my car building buddy was putting together a '36 Ford pickup. We went to our friendly local junk yard in Victorville hoping to find a decent flatty (cause they were CHEAP, we were in the Air Force not making much $, and it would be a bolt in). Our buddy behind the counter said "I've got just what you need" and took us into the back room. There in a couple crates was a freshly machined 59ab block, crank, and all the new parts to put it together. Oh, and a pie tin blower to boot.......................$25! There just wasn't a market for that stuff then.

At Bonneville a couple montha ago was talking to a guy with a sweet little 'liner that used to run a flathead V8. It now has a Nissan V6. The guy said he just couldn't afford to build enough horsepower into a flatty any more. The cycle continues........