For the '65 guys...build your own Commando!!
Somebody got it for $300.00. Would you really go to the trouble of installing a used cam and pistons in another block? What are the chances you can find a std. bore 273 block that has doesn't need boring? If course, the intake is only going to work on '64 or '65 model heads. Still, it's a fair deal for the lot.
Mark