i am trying to figure out the best way to see what metering rods to put in. I think that it is running rich but not real sure is there any easy to tune it or is it trial and error. I am running a 650 cfm on a 360 with stock intake, headers, 9.0:1 compression and a purple shaft P4452757 mild comp and performance rv rpm band of 1000-5000. The heads are j heads with 2.02 intakes any input would be helpful cause i don't want to have to take the top off this carb a 100 times.