The serial number is 346053. I don’t think you can adjust the secondaries at idle. It looks like they open up by the throttle linkage. But if someone who knows a thing or 2 about edelbrocks please chime in.
I did notice on that carb that at certain idle rpms you can feel the metering rods hitting the covers, but for the most part they’re sucked down when I open the covers. But I could lighter springs on it and see?
The plug wires seem to fit snug over the porcelain on the plugs. I’ve seen worse fitting ones cause no issues. And fit well on the cap
