I like Brian at Indio Motor Machine. He's a Mopar guy that runs 360's almost exclusively in his stuff. He's currently building an 48*R block/W2 360 for his Duster.
Brian recently had a 340 with stock ede's, xs282s and it made right at 460-470hp IIRC. It was a pretty nasty little piece. A little bowl porting and clean up in the runners and it would have made close to 500 IMHO.
