For Magic Mike:
Here is the set up I am running in my carb.
Pri jets .086, Sec jets .095, plain colored springs in the metering pistons, .067 x .055 rods.
I've also tuned with .068 x .052 rods and .070 x .052 rods but found what is in it now gives me the best overall results on this particular vehicle. The larger stepped cruise diameters tended to be a bit lean in cooler weather and at the same time the smaller power diameters were a little too rich in hot weather.
Not all of these rods and jets are part of the tuning kit you can buy for the 500 and some will have to be bought individually so shelling out $46 for a tune kit is a waste in my opinion. Check your Edelbrock parts list for rods and tuning parts.
You could use my set up as a start and see how it goes from there?
Trying to get a read on your plugs is not going to tell you much if you are running any sort of an HEI or CD ignition system. Those ignitors can keep all but the most severe loading up cleaned off the plugs. Driveability, response, and exhaust smoke will tell the tale if you take your time and don't have access to a dyno.
Good luck, Mike
