Thanks so much Philip @240260280 and @Lumens----but really, I still have so much to learn.
I've understood about half of the TSB. It is a loooooong step by step with no shortcuts allowed--quite different from the earlier Hitachi carbs.
The many adjustments required are probably responsible for the maligned reputation as " boat anchors"
As you know, I have gotten the flat tops running fairly well.
Now--- I know that the fuel nozzles are currently nowhere near the correct setting of .118---one is at .074 and the other at .051---just waiting to do a removal and adjustment as they are internal to the carb and cannot be adjusted while installed. I think once that is done they will really show some performance.
Nevertheless, they have already made it from Bentonville, Arkansas to Austin, Texas for ZCON 2017, through the great Circuit of the Americas parade (?????) laps (where my "optimistic" speedometer read 104 mph down the straight ) and back home with no issues.
(except for the flat rear tire from a utility knife blade in Killeen, TX on the way down----thank goodness for @S30Driver and @MikeW and @Captain Obvious).
Running a 73 240Z with flat tops and points and stock springs may put me in the "old geezer" record books on the COTA track for a while to come. (Not sure anyone else would care to challenge that with a run of their own)
Great fun! Let's do it again in Atlanta 2018!!
Thanks again for the TSB---much appreciated! I will refer to it often.