[rbohm]

you can get the rotating assembly for a 331 or 347 starting at about $1200. a new block from summit racing is like $350. or you can get the assembled short block for like $2100 usually with your choice of cam. you may spend a bit more for stroker motor than a 351, but you also dont gain front end weight which aids handling.
early 347's were tempermental, and used oil, but they were essentially race motors that people used on the street. cam selection as well as intake and head selection have a strong influence on how the engine runs in various rpm ranges.