To give some closure to this, and consolidate what I have learned, here Is what I have come up with:
I tracked everything down to convert to the '40s early '50s conventional blocker ring synchronizer assembly.
To do so I needed: main drive pinion(853864), clutch gear assembly(1115595) synchronizer stop rings (853867), second gear (852456), and the correct shift fork (1138246).
I also did the factory recommended upgrade and replaced my stamped synchro struts (detent plates) with the later solid ones. They most likely are directly interchange with early a-833 ones.
If you have a spare 833 one floating around your shop, I would love to confirm this.
I also got a synchro spreader spring intended for Fluid Drive cars, it preloads the blocker ring to help the 2-3 shift be more efficient. It is part number 1115576
I found that the blocker rings (WT243-14F) are shared by many different makers, including ford (B5A-7107A, Studebaker (1555429) AMC and Jeep(640397)
This lead me to see that Studebaker rings were made slightly different- they often have grooves that cut perpendicular to the inner threads, just like more modern rings. Apparently this is referred to as an 'oil bleed' and helps evacuate the oil that gets between the gear and the ring. Makes sense. Again, this helps the synchro be more efficient, which should give smoother, quicker shifts.
Of course, the rings I got did not have this feature, but were at least forged. I considered doing it right and making a drill fixture to add my own, but after talking to the engineer at my work (also a car guy) I ended up just cutting grooves carefully with a die grinder.
After spending so much time reading about blocker rings, I really wanted to play with cutting teeth off the rings to further improve shifting, but I couldnt pin down what would give reasonable longevity, so I just mimicked the stock T5 rings, but cut 6 teeth less off.
I ended up having to have my heat pump repaired, so I am not able to send everything out for REM polishing, but I belive I have all my parts together. Hopefully I can get this thing back together and give yall a report on how it shifts in the next month or two.