I just bought a Edelbrock A/F monitor, I know it's not a wide band, but I was pretty close to these numbers anyway....and I am cheap.

With my initial timing at 15, and total timing at 36....The highest vacuum, of 13 inches.
My reading at idle is 13 on the monitor.
At 4000 rpm's, I am at 12.5 on the monitor.


Should the A/F be at 14.5 for optimal? If so, do it with timing or the fuel from the carbs?