First of all, great work with the converter. It's very much appreciated.
For that matter, any thoughts on cultural tradition, army tradition, navy tradition, stability, starting money, prestige, infamy, or legitimacy?
I checked the 1399 start, and it seems that all countries have 0 infamy and 100 legitimacy (for those countries have legitimacy). Prestige ranges from -18 to 34 (pretty evenly spread out), and stability from -1 (Lithuania) to +2 (Alsace, Friesland, Byzantium, Gelre). +1 stability seems to be the most prevalent, closely followed by 0.
The other attributes are harder to check as they are not in the ledger (at least I didn't find them there), so I just checked for a few arbitrarily chosen countries: Sweden, England, France, Castille, Portugal, Austria, Byzantium, Lithuania and the Mamluks. For all of those except Lithuania and Mamluks, cultural tradition is at 20 and both army and navy tradition at 0. Lithuania is at 0 cultural tradition, 20 army tradition and 19,6 (?) navy tradition, and the Mamluks are at 0, 20, 20.
Starting money varies wildly, with England on top with 224 gold.
As for actual suggestions:
All three tradition values should probably be somewhere in the 0-20 range, possibly dependent on military and cultural techs or - more preferable in my opinion - on the attributes of the ruler and/or relevant council members. More checking of EU3 staring values is needed, though.
Stability is more difficult, but most countries should be at 0 or 1. More extreme values should be reserved for extraordinary situations (ongoing civil war, extremely high average vassal opinion or something like that).
Money can be pulled straight from CK and multiplied by some (lower than 1) factor to make it more in line with EU starting conditions. Again, more checking of EU3 starting conditions needed.
Prestige should probably be based on dynasty or ruler prestige, again multiplied by some factor to bring it in line with "normal" EU values.
Infamy and legitimacy should be at 0 and 100 respectively.
As said, more checking of EU3 conditions is needed though.
EDIT: and while someone (I'm in a bit of a bind currently...) goes through EU3 starting values, they may as well check the number of starting agents too, unless Id's already got that covered.