Swapped heads cam exhaust - how much power

[pima.1971]

The main spark adv table has 36* in by 3200 rpm but watching my datalogs timing never goes over 30*. Spends most of the time between 25* - 30* except under wot.

WOT at 2500 I'm at 20* and creeps up to 24* at 4500rpm at wot. Knock retard has not gone into effect so far. A few knock counts though.

I do understand not caring about numbers. But after all the effort I do want as close to 100% of the potential as I can get. I'm not satisified if i feel I got 70% of the potential even though it runs better.