Will a 1997 GEO Metro engine sohc interchange with a 1997 GEO Prizm dohc?
i dont think so.
I can't say for sure, but I have a 2001 Prizm and called some mechanics to look into having the belt changed, and they told me I didn't need to because it has a chain. According to the repair manual from 1993 through 1997 the Prizm used a timing belt and was an interference engine. From 1998 until end of production the Prizm used a timing chain. same with its mechanical twin, the Toyota corolla.
I recently swap 1996 geo/Chevy tracker engine with a 1996 suzuki engine and it worked. you have to make sure they both have G16A stamped on both engines. you MAY have to swap intake and exhaust manifold, flywheel, alternator bracket, and a few other things. just make sure they are the same engine (G16A)