You want to aim for 11.9-12.4 @ WOT at the highest RPMS you go to.
ie: if you revved to 6500 rpms the highest you want to see is 12.4 @ 6500rpms, cars make good power between 12.1-12.4 on carbs... idle around 14-14.7 but it should hold steady around what you set it at, say you set it to 14.5, it should only fluctuate to within +/- 2 points max.