SUCCESS!!! :-D Just wanted to let everyone know that I got the carbs back on today and the car started and ran beautifully! The mixture screws were right where we put them during the last real tune and before I over-tightened them. Final tip here, to make sure it never happens again, I found it next to impossible to find the "bottom" with the spring, washer, etc., so with the carbs off the car so I could watch from the inside, I removed the spring, rubber o-ring, and washer, and found the bottom. I marked the screw (ground a bit off that side) and the carb, so now I know where not to go past in the future. Worked really well--especially for a novice like me. Hope this is all helpful to someone else! P.S. Blue, I've been reading your posts on tuning...maybe I should take back "beautiful" and just say it ran as well as it ever did...you really have some impressive information posted...I'll look it over more carefully now that I have the car running again! Wahooo!