1968 Firebird 350 with small cam (specs unknown) however it idles in gear without the need for a stall converter. Stock cast iron intake, factory exhaust manifolds, HEI distributor (advance unknown) initial timing at 15 degrees with manifold vacuum to the advance can. This quadrajet has a number that reveals it originally came on a 1968 Olds 400 engine. I sent the carb to a well respected Pontiac carb guy for rebuild. He installed .071 jets, replaced primary throttle shaft, and replaced everything typically done in a basic overhaul. It now runs better however it is pig rich as it was before. Wondering what to try next. It stinks up the garage and my clothes. Any suggestions, advice, and criticisms are appreciated.