Very nice 800cfm unit.
Flow is restricted some from secondary airvalve opening, grind the stop tab for 1.36" from opened valves rear edge to back of choke air horn and you will have full flow.
You might try .0400"-.0300" secondary rods and 5/8 turn preload on airvalve spring.
Set the APT 3.5-4 turns up from seated to start with.
If required one change at the time and only if there is a real problem with idle:
1. Open the idle discharge ports some.
2. Open the idle tube some.
3. Add some idle bypass air
Measurement on the idle circuit modification depends on engine size and cam used.
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1966 GTO Tri-Power
1970 GTO TheJudge
http://www.poci.org/
http://gtoaa.org/
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