My early '47 had a 1956 Chevy car rear end under it, it fit like a glove and I was able to run 8 inch rims in the rear and no tire stick out. The newer S-10 rears are almost the same width and have disk brakes. They are 5 lug on 4 3/4 spacing so you can get a lot of different aftermarket wheels. If your lucky you can get one from a wrecking yard with a no-spin (check the option codes on the glove-box stickers) There is some info on the Chevy Tri-five boards about this conversion. Available from 1995 and up, 8.5" ring gear 30 spline axles, standard for 98+ ZR2's with rear discs
Look in the glovebox at the RPO codes (list of factory reference codes as to what parts were installed on the vehicle).
GU2 2:73 ratio
GU4 3:08 ratio
GU5 3:23 ratio
GU6 3:42 ratio
GT4 3:73 ratio
GT5 4:10 ratio
GQ1 Open Differential Rear Axle
G80 Positraction/Locking Rear Axle
