[screamingchief]

Safe bet that the explanation for lost power is the reduction of cylinder pressure from the later IC event,coupled with the loss of some overlap from the wider LSA and not adding enough duration to make up for that loss of exhaust scavenging due to OL.

OE/ported pontiac iron heads love overlap in race engines,it helps make up for the weaker ports,as long as the exhaust is up to the task as well.

The reduction of cylinder pressure explains the reduced abillity to detonate.

The loss of overlap also means the VE likely dropped some too when the scavenging was reduced,so the cylinder is'nt filling as well in addition to the later IC event trapping less charge.

Installing the new cam striaght up just compounds the whole deal.

Was the new cam degreed when installed?

What are the advertised specs for that cam?

As for the igntion,my advice is to lock out the advance mechanism and phase the rotor and see how it responds,odds are that will be help a lot,and if you want a curve after that,run an electronic ignition curve box or such.

I would try advancing the cam to a 104°ish ICL and try some 1.65 ratio rockers on it,and run the lash as tight as you feel comfortable running it.