proform secondary guidance

7dart0 said

380HP crate cam which is .230"/.234" @.050",.501"/.513" lift on a 108 centerline.

idle vacuum 12-13hg, 13:1
drive vacuum 7hg, 13.8-14.2:1
unsure of cruise vacuum yet (need a longer piece of vacuum hose). cruise afr is 13.5:1
IFR at bottom
about 1 turn out on 4 corner idle

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5 to 6 inches of idle drop is a red-flag to me. I think your primary t-valves are too far closed. The Transfer-port exposure should be a little taller than wide. Set the idle-speed with idle-timing and idle air bypass, with the primary mixture screws set in the approximate center of their range. If that means you have to close the secondaries, then, so be it.
The idle-speed should not drop 150rpm going from N/P to in-gear; 75 to 100 is more like it with a 2800TC