Edelbrock models 1405 versus 1406 carburetors

I had that same meter in my old 76 drag dart! I like the AEM for it is super easy install. & 12.0-12.5 itsnt to bad @ all for a WOT A/F raito man,thats about all the leaner you wanna go for WOT max power for a carb. Your rite weather & temp come into play for sure. That's why im leaven it be until nicer weather is here! its a bit lean now but when temps go up it should be balls on! for cruise A/F raito. But bog is gone! yay!