Normally a Holley WITHOUT a secondary power valve and a rear metering block will have 8-10 size bigger jets in the rears. Usually are about right that way. I wouldn't drop them down to 72's from 82's in the rear, thats too lean!
Ok I realize this is not every carb and combo. Its just from my personal experience and from what I learned from a guy that has been tuning and racing for 20 years. Best way would be to have a o2 sensor in your exhaust. Or on a dyno.
