[pmd400]

Iv read this whole thread, it's very interesting.
In a 9.5:1 iron headed 455, a cam with a 274 adv duration and 230 at .050 is considered to small. It doesn't make as much power as it should and is octane sensitive.

A crower 60919 has adv duration of 304 and .050 duration of 231. It makes great power but works best with 10:1 compression and rhoads lifters.

Is it possible that a cam with 230 at .050 and an adv duration of about 290 using standard lifter would be a good compromise? I understand that some companies also use a different lift point for advertised duration, so some cams seem to have a longer duration but in fact they are just measured at a lower lifter point.

Crower, comp, howards, lunati, melling all measure the advertised duration at 0.006 of tappet lift