well i bought new comp pro magnum roller rockers, studs, pushrods, cleaned cap real good, changed wires, put black springs in distributor, it somehow seemed to drop my initial timing down to 16. i took it to the track, ran it, it was 13.90s all day, last pass put the initial up to 21 again, ran a 12.80. I cant complain about the time since its never ran that fast, im gonna leave it there i think but it just seems unusual, i guess every motors different, just hope its not too much.