disapoining et

i am using the pro-billet dizzy with black bushing and 1heavy-1light silver spring.
the carb is a holley 4160-4224 660cfm center squirter, mech secondaries. it has been reworked and flows 952cfm with #85jet. when i read the plugs after the run i had 1 tread dry so it is a little rich, might step down in jet size. but before i do that i want to check the rest of the suggestions on tunning posted here.

Thanks again for all the detailed responses!