Help me build my 340!

Depends on who does the head work and what you consider a fair sized cam. My old 340 made 480hp on the dyno. 11:1 compression, Ported J heads (I want to say they flowed 260cfm @.500" but that may be wrong) 260/265 @.50" solid crower cam, Ported Victor intake and a Proform 830cfm carb. HP peaked at 6900rpms, Tq came in at 425ftlbs @ 5500rpms. It needed a mix of race gas, idled at 1000rpms. Probably not the most streetable thing. the 4" stroker crank would have dropped the curve down to more street friendly levels.