Will a 00 Chevy s10 radiator support fit 96 262 cid?

No, a 2000 Chevy S10 radiator support will almost certainly not fit a 1996 Chevy S10 with a 262 CID (4.3L) engine. While they're the same generation of truck, there were subtle changes throughout the production run (1994-2004) that affect body parts like the radiator support. The mounting points and dimensions might be slightly different enough to cause incompatibility. You'd likely encounter fitment issues, even if it seems like a minor year difference.