Holley 650 ultra double pumper

I ran a manual choke eddy 750 ran amazing but blew black smoke, ran the 650 dp ran great and blew black smoke, now running a manual choke eddy 600 and runs great but no black smoke. And yes I tried tuning the dp and jetted it down so much to the point it would just bog. So it's just not right on my motor. Maybe someone else has better tuning capabilities than I do that could tune it perfect to a 318 but I tried and couldn't get it