Tester Analyzer

carbureter tuneing tool?

i’m a fairly experieced mechanic and i know how to tune a carb with a vacuum guage and roughly by ear, but i saw at one time in a mag for adjusting carb with some sort of digital guage of some sort hat would tellin u if it was running rich or lean and to tune accordingly i think it was in a jcwhitney mag but not sure it was awhile ago and it wasnt that expensive, where can i find this tool? its some sort of gas analyzer and was not a emission tail pipe tester. with gas costs like they are i would like to get alittle more out of my 78 chevy and a couple other trucks i work on.

You can use an Air/Fuel ratio gauge, try Summit Racing or JEGs and search Air/Fuel Ratio