any tips for tuning weber 34ict? Options

[JOE M]

Curious about how to set the carbs up.The timing is close but may be out slightly.I started by turning the air mixture screws all the way in and than backing both off by 2 1/2 turns to start. I let the car idle and than I move 1 side until the car runs rough than back off the other way about 1/2 turn.I did the same for the other side. It runs ok but pops through the exhaust every now and than.It gets better when I take the throtle linkage off.I think my biggest problem is seting the idle speed screw. Is there something I should do prior to starting any other alignment?I read the procedure but I am stumped. What typically causes it to pop through the exhaust?I did check the vacum on both sides and they are real close ( within 1 of each other).

[r_towle]

Two type of vacuum ports bud.
the manifold vacuum gets tied together, and thats it.
The vacuum you want for the distributor is above the throttle plate so it uses the itty bitty ports on the carb itself, not the big ass ports on the manifolds.

So, tie the two Manifold ports together.
Tie the little carb vacuum ports together at a "t" and run the third leg to the distributor advance.

You never want an open vacuum port on any part of the carb or manifold, it will run to lean and it will be impossible to tune.

Rich