That basic 215 cu in is still being built and in production. As for the 60, it is possible it is still being built, in 1956 it had been stroked to 100hp, by 1/4". Friend of mine ran across one in a junk yard in Texas, and promptly put it in a motorcycle, he's a bit out of balance like me, if you want something, you don't worry about cost, because you're going to do it yourself, because you aren't afraid, and it's a challenge, it's the only way a poor man can do it! Bob