[Excaliber]

The "engine wants to stall" at idle condition may be nothing more than the idle speed is to low or the carb air/fuel ratio idle screws need a slight adjustment. What worked on the dyno, for the carb adjust, may not be perfect for the real world environment where the engine lives on a daily basis.

Dual fours can be tricky, I run them as well and like them a lot. But, they are ***** sometimes to get dialed in.