408 question and advice please

the only parts i do have are a set of harlan sharp 1.65 roller rockers for a sb bow tie ( i know bad words) knowing mopar stock duration is 1.6 that will give me a touch more lift than stock. in order to use these im going with the edebroc magnum performer rpm heads and matchin performer rpm air gap manifold. im watching junk yards to find a 93' and up 360 so i can put this plan into affect. as for cam not made a choice on that yet.