Ok fellas, i have a 421 cubby with CPI sb pipes, and my carbs are 34 pjs... with 8 inch filters... im have a terrible time getting this motor tuned... .... its spitting out black oiily stuff out my silencers, and smells like shit. and i feel like its to rich, it stutters and you have to keep it revved up and stay in the pipe for it to run half way decent. my jets are a 145 main, 42 pilot, clip on 4th(prob to low), my air fuel is turned out 1.5 turns, and my timing is at +8 which ill turn down to 4 when i get a new puller... and my elevation is 2000 above... any help would be appreciated.. thanks alot..... oh yeah, just wondering what everyone else is using on jetting with a similar setup...