-Do you have idle speed, base timing / full advance specs from Paul /Jeff Korner?( carb builder) for this engine/dizzy/carb combo?
HWYSTAR mentioned he baselined the idle mixture screws @ 3/4T out.
-Where were they before adjustment?
Does the engine respond to adjustments, via the vacuum gauge reading?
We use Braswell custom carbs exclusively on all our race motors, the baseline on the gas motor is 1 1/4 to 1/1/2 turns out (4 corner idle). Purpose built, Custom carbs can vary greatly from an out of the box Holley.
A loss or drop in oil pressure is a big difference if it was at idle no load vs during a full pull at high RPM.
I'm disappointed and truly surprised Paul has drawn back from helping getting this figured out and remediated.
BTW:
I have no interest other than to help identify and repair this/these problems in a in a concise and logical way.
