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Andy4639 · 08-11-2017, 04:10 PM

The timing and idle are way off. You need to set the carb air screws to as much vacuum as possible at idle with a nice smooth idle also around 650 -800 RPM's.
The base timing should be set with vacuum advance disconnected and plugged at both ends, the carb end should have your vacuum gauge hooked to it so you can set them to max. This will require some playing with the screws. Keep both screws to the same amount of turns. You will have to set the idle screw also as you do this to keep it the same.

08-11-2017, 04:10 PM	#15
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: Not Your Average Overheat Question The timing and idle are way off. You need to set the carb air screws to as much vacuum as possible at idle with a nice smooth idle also around 650 -800 RPM's. The base timing should be set with vacuum advance disconnected and plugged at both ends, the carb end should have your vacuum gauge hooked to it so you can set them to max. This will require some playing with the screws. Keep both screws to the same amount of turns. You will have to set the idle screw also as you do this to keep it the same. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.