Judging by how long you've told me the engine sat your gonna have carb issues. Go through and clean the carb out. The hesitation through the rpm rang can be either vacuum leaks or lean fuel mixture, or even your spark is not advancing properly or timing way to retarded. Clean the carb, throw in a new set of plugs, make sure the distributor cap and plug wires are in good condition, make sure you've got fuel pressure as well and that your fuel line and filter aren't dirty cause if they are that will cause poor operation as well. You say it hasn't ran right since it was rebuilt? Then there's a ton of other factors that could come into play, but for now...check the carb, check your ignition(plugs, wires,coil, ect) and adjust your timing to 8-10 degrees advanced without vacuum, and make sure you have good fuel going through the system.
Last edited by TJ's Chevy; 02/18/2015 3:20 AM.
