synchro interchange/best ones to use

Ok,Ok; whats going on here?

As noted the 3-4 hubs from the Ods will not fit any other tranny. They are Od specific. And in the regular box, the 2 hubs are also location specific. So no, the 1-2 hub from an Od tranny will not work in the 3-4 location of the regular tranny.

But again, what's going on?
If the tranny is not jumping out of gear, then the the synchronizers are fine irregardless of how they look. And if the brass is done it will be grinding gears at the shift. Many times if the tranny jumps out of gear during deceleration the clutch teeth can be back-cut and the gears returned to service.
And on a personal note, I prefer the feel of the old style stuff.

Oh, and please don't try and use synthetic oil in that box;it is way too slippery.If the synchronizers work at all, they will be slow. I had to mod all my cones to cast off that oil, in order to use that stuff, and it still shifted better with dyno-oil.