Weber Carb problems, To Lean? Options

[thomasotten]

Ok guys, tell me if this sounds right. My engine (big bore 1911), which we are starting on the ground, is backfiring through the carbs under acceleration. We adjusted the valvles, engine cold, to .006 all the way around. New plugs, gapped to .024, new wires, rebuilt the carberators (dual Weber 34 ICT). Someone told me that I need to rejet the carbs, that backfiring through the carbs is a sign of running too lean.

So when I go down to the VW parts store to buy larger jets, the guy tells me that my valves are off - that the too lean stuff is bull. He tells me that the exhaust valve's are set differently than the intake. I thought they were both .006?? (IMG:style_emoticons/default/confused24.gif)