1405 lean at WOT

It looks like you should be aiming for the lower right quadrant of the tuning graph, not the lower left; my experience with Edelbrocks is that changing the secondary jets is for fine tuning. It looks like you may want to study #23 and #26 on the graph; they SHOULD lean out cruise and richen up the power circuit. By going to #24, you leaned out the power circuit. Also remember that you shouldn't be aiming for a specific number on your wideband; give the engine what it wants. All engines are different; use the wideband to make sure you're in the ballpark. Obviously, you're a little out of the ballpark right now, but you'll get there.