I would change the secondary jets first to get it in the ball park before messing with high speed bleeds, it is way easier to change the jets than to solder or weld up the bleed holes, isn't it
Use the air bleeds as the final last fine tuning aid
I have mess up more than one Carter AVS by adding size to holes in the secondary fuel delivery tubes and air bleed holes
One last thing is if you can't jet the carbs. up enough to make it better look at the needles and seats sizes