Vette1986,
Sux you had a problem, but glad to see you found it!
Think of the Six Pack as an expanded vacuum secondary 4 barrel carb. The front half of a Holley 4 barrel is the center carb of a 6pak, the rear half of a Holley 4 barrel is the end carbs. End carbs have metering plates, not metering blocks (similar to small Holley 4barrels) and NO squirters. The metering plates have jets but they are not replaceable stock, they are drilled orifices in the plate (aftermarket sells plates with replaceable jets...Promax)
It idles on all 6 throttle plates.
It runs on the center carb at lower throttle openings.
Runs on all throttle plates at WOT. The end throttle plates open due to higher venturi vacuum (air moving fast through the center carb) in the center carb, the vacuum hose that Ts to all the carbs tranfers the vacuum. The vacuum must overcome the secondary springs, the firmer the spring, the later and slower the end carbs start to open.
Hope my ramblings make sense
