Thermoquad low vacuum readings

Idle now in the 14.5 to 15 range.
11” idle vac, around 16” at steady cruise. Tweaked the rods screw a bit, so cruise A/F now just a bit richer, at 15.8-16 or so. Getting there!

Still goes lean (17.5-18) giving it some mid rpm throttle. This motor really liked Edelbrock’s strongest springs. Maybe here is where I stretch the spring a bit like dana suggested?