OK so now I understand the low band apply will engine brake in all 3 gears and NLBA only in 2-3.
I guess my question now is how does this differ from a full automatic? I'm picturing the car not really coasting with a manual valve body, is that the case? I have driven many many miles with a manual transmission and as you coast up to a stop sign or whatever it is nice to just drop it into neutral. On a reverse manual valve body, that would not be possible since 2 and 1 are in between. I may rethink this whole idea. Granted a forward would work but I would never trust my column shifter to not drop into R. I would definately want to replace it with something a little safer in that case.