Ok, one more question on the Holley jetting.

What elevation are you at? If your at high elevation the IFRs are to big. Most OOTB carbs are setup for sea level.
Are the IFRs at the top or bottom? Move to the bottom.
Are the air bleeds tune-able. If not drill and tap for 8/32 brass set screws.
Treat the idle/transition circuit as a mini carb. With an OD trans driving around town you are definitely on the idle circuit.
Drop the IFRs in .001 increments and readjust the idle mixture. You will also find a smaller MAB will allow you to control the idle circuit curve. With the OD trans you are cruising around in low throttle high load conditions when the OD gears come in.
I run a GVOD and find the smaller IFR/IAB lets you get control of the carb in the 0-45 mph range. Getting the idle screws in the 1 turn out range has worked for me to get an acceptable idle in neutral/drive and off idle transition.
Transition slot restriction is another option but I have had success without them at sea level.
Don't get wrap around the axle with the AFR gauge in the idle circuit range. Low throttle high load needs a richer mixture for driveability. Read the plugs, clean but not white for today's fuel.