I have posted questions on 350 Chevy with quadrajet dropping RPM at stop lights. Took car to OLD expert. Found that vacuum line was hooked to wrong side of carb which put vacuum on distributor all of the time instead of only when secondaries were open. Idle jets need to be 3 1/2 turns open which they weren't. Simple things but made all the difference in the world. MORAL get someome smarter than you to give you a second pair of eyes. Most problems have a simple solution.... DAVE E SHANK davesr@trianglesalesusa.com