Newbie 318 piston question

There are way too many hurdles with a 318... once you clear one there is another. Yes its great if you have a bunch of parts laying around and a machine shop and plenty of time for trial and error. Guys get excited because of the same crank dimensions as a 340.
you know even back when i was a kid the misinformed would say "a 340 is a 318" its funny to me that it still goes on now.