small hesitation off idle

Start the engine, let it warm up until operating tempature and then take a can of carburetor cleaner and spray around the throttle shaft on both sides of the carburetor.
And I bet you the idle will smooth out, Indicating a vaccum leak. The edelbrock carburetors are infamous for worn out throttle shafts bores, which in turn causes big vaccum leaks, and a big vaccum leak will cause the hesitation you are describing.