ive got a 79' z28 with a 350 that was made in california. since it was made here they de-tuned it to like, 170 hp...i was wondering what could be done to re-tune it to get out its full potential. its got a 4 barrel rochester quadrajet and a new-er cam lol. i didnt put the new cam in so i dont kno what the duration is, but its not too much if any bigger than the one that came in it.