[MOTORHEAD]

I think your buddy is on the right track. I was having problems with my webers when I first put the engine together, nothing seem to work, backfiring on drivers side only on de-cel. Finally decided to put 4 barrel set up on, and while doing that, noticed uneven intake surface on drivers side head. Smoothed it out by hand with a file and installed 4 barrel and problems were gone. Intake gaskets couldn't seal the way it was. When I pull the engine I'll have the heads surfaced, and try the webers again. It's the kind of challenge I like !