The Pontiac 215 engine is the same animal as the 194 / 230 / 250 Chevy, and as Twisted points out the OHC 230 Pontiac is different. It wouldn't surprise me if you did have the Chevy 230 in your Pontiac. GM has been known to install engines from other divisions - The Pontiac Ventura ( derived of the Nova ) of the late 60's early 70's as an example.