Rear spindles 1990 G body

[inplansight]

Ok guys I am having some issues with the rear brake set up on a 1990 Daytona with 11'' rear disc brakes. I am in need of spindles and hubs I have been through my hoard of parts and have found that there is at least Three different hubs I was under the impression that there was only two?

Since this is a mix and match job can anyone tell me how tall (to the hub face) this car should use ?

I did find a rear axle out side with a older (87?) Non-vented disc set up still together will this work or will I need to find a 1990 set up ?

Thanks Paul B