Sounds like some good techniques mentioned.
So here is how it did.
M1 15mph(rpm 1756)(co2 13.2)(o2 3.5)(hc 29)(co 0)(no 1935)
M2 25mph(rpm 2736)(co2 13.8)(o2 2.6)(hc 8)(co 0)(no 1153)

and this is the standards.
15mph hc max137 Ave43, co max.94 ave.16, no max1107 ave406
25mph hc max109 ave32, co max1.19 ave.15, nomax1163 ave349

I was concerned about the cam. It seems to run lean so to speak. I do like the fuel economy however. I just need it to pass and then I may put multi point fuel injection on. I have a wolf 3d fuel management system already and it is totally programable. It can pre programmed for performance or economy and it saves the setting so you can easily change back and forth.

De natured alcohol, how does this work? Sounds like the cheapest plan that insures passing if it truly works.

I do need to check the o2 sensor, although it is only a few years old. So when you say closed loop, you mean zero resistance when hot right? Like shorted? What about when cold. I missplaced my manual and can't reference at this time. Or does it produce voltage like 1 volt? I forget.

EGR passages and valve are all working, weather or not the control switches are working correctly is another question, but has passed with it configured this way other years.

I may try one step colder plugs, but won't this also affect my hc?

Changing the cam is going to happen, just is it prudent to do so before testing or will it actually help the test. I have got to get some photo's of the lobe profile for you to look at as I think the duration may be longer than I want. The lobes are more round than pointed, and seems strange. The caravan I pulled it from had recent head work and the cam looks new. No wear so to speak, clean like new etc. could be a performance cam unwittingly put in the caravan and then couldn't smog so it ended up in the boneyard. In other words, questionable origin for smog purpose.