Really appreciate you working with me on this. I'll drive it tomorrow morning and see what we have. That garage was so hot this afternoon that it ran me out and into the shower!
When I pulled the top off, the weight connected to the heavy spring was not fully retracted. The spring was on the pin but had a lot of slop in it so did not provide any tension. After this change I did see the idle drop from 750 to 650 in gear. Was a bigger drop before making these changes. Tomorrow's test will tell more. Thanks again!