Is It Posi? (8 3/4)

ok so ive got a sure grip unit 742case want to put in place of my "open diff unit using the GREEN brng set up what gets done with the inside axle spacer from the adjustable axle set up ???

Don't need the thrust spacers with green bearings as there is no adjustment.

Don't always buy the tire spins the same way test. I've had gummed up open rears that were locked together. Have someone try to hold the other wheel and spin it.

The rear may have an additive tag on it, but, that's not a guarantee either.