High throttle miss

[Texasdoc]

Anyone have any suggestions on what changes to make? I have the original jets that came with it - 74 primary, 82 secondary (with extension tubes). 6.5 PV. I have the idle screws set where it idles about 13.5:1. I think it is very rich thru the transition circuit.

I've also noticed (and noted here before) that minimal changes in the idle screws make a huge difference in the AFR at idle. 1/16th of a turn of the idle screws will change the AFR by a whole point.

Primaries are set where the transfer slot is square (as tall as it is wide). I use the secondaries to set the idle speed (1000 rpm).

Frequently, the car seems like it doesn't want to return to idle. The RPMs will hang around 1200-1300 and eventually creep back down to 1000. I have two throttle return springs so I'm pretty sure it is returning to the stop screw.

Idle - 13.5
Off idle/cruise at 1500 rpm - 11.0
Light acceleration - 12.0-12.5
Medium acceleration - 13.0
WOT - starts rich 12.5, ends at 13.5

Letting off the throttle, it goes pure lean (gauge pegs at 17) then settles down to idle at 13.5. Going around a corner or heavy braking also goes lean. Fuel is 1/2 way up the sight windows on primaries and secondaries.

Thoughts?