170 & 225 head swap?

Okay so I picked up a head gasket from Napa, and the guy at the counter said I should use this aerosol copper spray stuff on the gasket, block and head before assembly so it seals better so I grabbed that too lol, but I dont know if I need it so thought Id ask here.

Also, can I reuse the head bolts or should they be replaced? Anything else I need to know?
Ive looked for some videos on this but the net is kinda sparse on such content, Idont suppose there is a tutorial somewhere someone could point me to for more information?

Thanks guys!

If the head gasket is the steel shim type, yes, use the spray sealer. However, if it the MUCH more common composition style, do not use anything at all. It is very, very, VERY unlikely they gave you a steel shim gasket, as they are extremely hard to find. Post a picture of the head gasket so we can be sure to give you the correct advice.