Thanks Bob. Man oh man. I was hoping to find some hint but as you said there's virtually no clue, is there? I can read the numbers on the throttle body but those are generally of no use...other than they may indicate when it was made. Maybe. You probably are on the right path by altering the float level...monotonous as that work will be. Generally 1/16" difference in float height will amount to 1 step difference in the jet. My experience has been even a very slight change will make a difference. Maybe raising the float level a wee bit would help with the lack of power on incline. Just be certain you don't change it enough to cause it to dribble into the venturi, though. At a point it will start doing that. Sorry...had hoped to have some more information for you.
