IDA3C Weber Troubleshooting Options

[Cfletch]

Hey there everyone, working on getting my 6 conversion going here and I was able to hook up a temp fuel system in place of my tank while I am waiting on a few parts. I wanted to get the car to idle with its new fuel pump (not yet regulated down to 3.5psi) rated at 5 PSI max. I wanted to get the carb bodies full of fuel and get some pressure into the system and as soon as the pump turned on with the ignition the carbs essentially started dumping fuel down my intakes. Almost as if there was an internal leak causing fuel to just enter their respective cylinders. I'm new to down draft webers so this confuses me. I popped the top off of one of the carbs and noticed the fuel level was extremely low in the bowls so it was not like the needle and seat were stuck or a float was stuck causing it to overfill. Kind of stumped here as these carbs are rebuilt. Really any suggestions are good here. the float level was set, the needle and seats are good and not sticking at all.

I read somewhere but not in much detail that the bowls are vented? I have these little plunger-esq things in each vent tube that I have not yet pulled out. Would that be the source of my problem? If the bowls couldn't vent its just pressurizing the changes and causing the fuel to just leak down into the engine?

[Cfletch]

Ok team here is an end of day update.

My vents were the culprit for the initial issue I mentioned. The vent tubes were sealed with these little plugs for lack of a better term, causing the air/fuel to not have a place to go when the pump was turned on. It basically just created too much pressure in the float chambers and the fuel had no place to go but out the secondary venturi's and pool at the bottom of the carb and sit on the throttle plates.

Next issue I tackled was one of the float levels was too high, you all guessed it, but before I could not even get to that point because of the aforementioned reason. I then popped off the top and saw it was too high and so I messed with the tab and also checked my needle and that one was bad even though new like mentioned by one of you, so I put in the old and that solved that issue.

Now its onto tuning. My passenger side bank seems to be running really rich as that side is popping out the exhaust at idle quite a bit and the other side is not. I also checked the exhaust temps and that side is significantly less hot than the 'better' running side. I have the suggested jetting for my engine and that is all new. And want to reiterate that I do not yet have the recommended fuel pressure as well as float level set. Thats in the mail!
Would it be recommended that I get those 2 things resolved first before tackling any form of tuning? I assume the answer is yes, but would those 2 thing cause my funky poor running on 1 carb/bank vs the other?

Any info is most appreciated!!