383 dual quads lean at idle and cruise

Fwiw the Weiand tunnel ram is exceptional.
I've run it on a 383 with 390s and 600s, 1:1 linkage.

I'm no carb expert, so listening to the smarter than me folks above is a good bet.

Captain Obvious here, for single, the Performer RPM is the best.
I ran that Weiand 8008 and it was ok.