Yall are off the mark, IMO saying that cam isn't a good one. Yall are comparing advertised duration of the 340 cam to the .050" duration of the cam he has. You cannot do that. The .050" duration of the 340 cam was actually very close to what he has now. I doubt very seriously the cam is where the problem is.
Just reading through this and I was like "his cam is very close to a stock 340 cam".... one is advertised and one is @ 050 ... then I see RRR pointed that out...
Carb is not too big.