Ok, so after replacing leaking vacume lines on my 85sd 's turbo system interesting things happened. First, noticable (while driving, not measured) increase in turbo output. Starting at slightly over 2000 rpm, noticable increase in power and acceleration. Cool, but left a real bad flat spot from idle to that point. So, I adjusted the alda, and the car now runs like a different car. Very cool.
But, now it downshifts much too soon when in high gear and you push on the pedal. What have I changed? How do I fix it?

I have not tried any transmission adjustments myself, but I have seen a number of very favorable references to this article by Steve Brotherton.

Bowden Cable (Search if you want more) now needs adjustment. Your shift point was set for a 'sluggish' engine, downshifting to bring up rpm and power. You want to re-set the cable so that the transmission 'thinks' you are using less throttle than you are.

Best Regards,
Jim

Here is another good article.
http://transmission.articles.mbz.org/adjust/