Lean idle. Rich cruise.

Ironmike said
Wondering why the PO blocked the middle emulsion?

Out of the box most of these 3 e-hole blocks are over 'emulsified'. In other words the fuel is no longer an emulsion of liquid with little tiney amounts of air but liquid with big bubbles coalescing randomly and unpredictably.

Ironmike said
Tried changing air bleeds, P Valves....all for naught.

So maybe the problem isn't fuel.
Or the circuits you're messing with aren't the circuits that need fixin.

Ironmike said
but any "spirited" acceleration on just the primary got dangerously lean.

'splain that.
Lean can be dangerous under heavy load. Going leaner under moderate acceleration is correct. (Yea I know this is contrary to what many of us thought)

Ironmike said
Timing locked at 33 degrees.

This is likely making your quest more difficult.