A Griner should be a low band apply unless it's an older one.

Realistically, you can start out in 2nd or even 3rd if you want, it really won't hurt anything.

You can tell instantly if it's an LBA or not. Back off of it in 1st. If it has engine braking it's an LBA, if not, it isn't.

Do not downshift into first while you're coasting with an LBA. Try it once and you'll find out why.

As said before do not downshift to low and get on the gas if it's a non LBA. You can roll the sprag and things will go downhill from there. 904 isn't nearly as bad as a 727 about rolling the sprag, but it can still happen. 904 usually won't explode either.

Yes, you can downshift 3rd to 2nd and gas it for passing, etc., LBA or not.

I've driven many thousands of miles on the street with a manual valve body. No big deal once you get used to it. Almost as much fun as a clutch car.