What jets is everyone running in there holley's

You should keep the difference between primaries and secondaries the same as from the factory unless you start making major changes, like eliminating power valves, cutting off choke towers, etc. Different manifolds and spacers can affect distribution also, but you need to be able to "read" the plugs correctly (not always possible) or have the proper data acquisition instrumentation to compare cylinders.

Here is a lot of good Holley info. For their original carb jetting, click on "Carb Numerical Listing".

http://www.holley.com/TechService/Library.asp

I was lucky once and noticed a difference in plug color using a dual plane intake. Turned out that the cylinders fed by the lower level of the dual plane was running leaner than the upper level. (weaker vacuum signal?) So I adjusted the jets 2-3 numbers on one side of the carb and the car picked up at least a half a tenth. Your results may vary.