can someone tell me what kind of rear this is? it came out of a 78 camaro, so i was told. this is the number on the axle tube, PXG71542. is thia a 8 1/2 inch?

shows up as a '77 firebird rear, 3.23 posi.

thank you, would it be a 8 and a half inch?

yep 8.5