I would get a few return pills, .080 to .100 maybe in .005 increments, i set the barrel valve between 22 and 28 percent leakdown, depending the throttle response. Nozzle size is a toss up Ex: we're running 39's on a 514" ford with a -1 pump, i run 33's with a -1/2 pump, i built a 383 and he had 31's with a -1/2 pump, then i have a freind with 427 sm/blk that runs 36's with a "0" pump, i ask him why so big, he said because it works, i couldn't argue with that since he run consistent low 5.60's at 123 mph in a 55 shoebox weighing 2650 lbs.
I usually deal with Ron's because i knew him when he started in the 1980's when i lived in phx. Not to say i have anything against James Monroe, i just don't know him and i know he's hard to get touch with during the racing season.
JMO