took my 235 out today and after installing a new carb and new fuel pump i am running rich , i can tell by the smell now i have adjusted the choke and fast idle and air mixture and floats ,, what else can i do , it starts ok and runs ok only at idle it does this i can even see a tad bit of smoke ,

thanks

1958 chevy biscayne
235 6 cyl 1 barrel
2 speed PG tranny