1965 Chevy C10 350 engine woes

[Blk63vette]

Hello
I’m getting ready to finally start working on my truck that was pulled from a Texas farm. I drained the oil and there was gasoline mixed with it that suxs. I bought a scope to look at the cylinders. I wasn’t expecting much. Since this truck has been sitting since 1987. I took the spark plug out of cylinder one. I never seen so much caked n oil on a plug before. When I took it out it made “whoosh” sound like compressed air coming out. Looks like the rings are rusted to the cylinder walls in this picture. My question is it worth trying to get running? I’m leaning towards putting my 327 engine in there instead what do you think?