They're out there. Probably more 318s but 360s can be had cheap. Think about it, 1974-1989 LA production then the Magnum to '04, there's literally MILLIONS of 'em out there. Bet you could walk out your door and stub your toe on one laying in the dirt.
After reading a few more threads, I see some people saying that Supercharging is easier to set up that Turbocharging. If there's less fabrication and work and plumbing, is there at least a comparable price?