I put them back where they were originally. Hooked up the carb sync tool, made a pretty big adjustment to carb #1, and a small tweak to 4 and she runs great now. Wish I would have known carb syncing was that easy.
-2001 Tahoe original 5.3 4x4 only 430k
-A Metric Butt ton of three wheelers
-1985 V65 Magna
-1983 Nighthawk 650
-1969 F250 Highboy built 360