I found an 84 Z28 with this option code. The decoder says it's a 9.5 inch ring gear? Is this true? It also has GT4 so it's a 3.73 ring and pinion. Also what the diff in RPO and SPO?


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85 IROC,5.0 TPI,T-Tops,fully loaded,black with red Lear-Siegler "Camaro" interior,Decal Delete,91 Bose stereo,Stage 2 Fastchip,AFPR,TB Airfoil,K&Ns,March pulleys,Alum. Driveshaft,92 police version 700r4

"The Devil drives a Camaro"

 

hey man whats up,

I have a 84 z-28 with both of those codes also.I havent been able to find what they mean but i've heard its a 7.6 rear end.