head gasket replacement

well i know now that i have a blown hard gasket on my 79 350 buick motor after searching online for some info on how to go about replacing them i came up with nothing which i strange would it be a good ideal just to swap out the motor or just replace the gaskets

that's what I did thanks for your reply this is my first doing a head gasket job out of the years of working on cars im more of a minor work mechanic ,again college man thank you