Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

OK. I'll add this because its not going to come up otherwise.
Four corner idle. On this engine, shut them off (turn all the way in) and then just crack 'em.
You can seach four corner idle and poor man's four corner idle for what they do, and you'll understand why I'm saying to basically shut the secondaries to a trickle.