It's one of Chevrolet's production codes on the build sheet,like zr2 that they decided to use for the public,probably for a cool sounding extra.
5200 lbs.
Yes, but it requires considerable frame, suspension, colling, steering and core support mods and a solid axle swap from a 3/4 ton is strongly suggested and I'm speaking from experience having done the conversion in a 1st gen S10.
The ZR2 and the ZR5 both come with the 4.3 Vortec SLS motor, which is cam'd bored and stroked. So its actually not a 262ci 4.3L, its more or less a 275ci 4.5L. This SLS motor was stock with all ZR2's and ZR5's, but it was a rare option when buying a 2WD S-10. I have a 1999 S-10 2WD SLS Regular Cab. It has a cold air intake with true duals (Flowmaster 40's on each side), stock cats, E3 Diamond Fire spark plugs medium grade wires, Mobil1 Synthetic, Fram Filter, all aluminum radiator, serviced my cooling, transmission and the rear-end, everything else is stock. I push 205H.P.-208H.P. (depending on the temperature outside) at the rear wheels. And once again the only mods are a cold air, and true duals. From the factory, you get 190H.P.