Chinese BBD Knockoff...?

I am thinking at the least the knockoff carb should be set up and the specs checked etc. I think the fella just buys em and bolts em on... what sucks is I sold him the 318 he washed the cylinders down with gas now it smokes...I said "if the rings aren't sealed it may be because ya washed em down with gas...thing is though the smoke doesn't smell like oil whatever it is I don't think its oil, the smoke is like its rich only it isn't black smoke...more of a dark gray...right now I'm rebuilding my Carter BBD and will try that ...