Head gasket questions

[1953]

Ok have a 53 Chevy 3600 235 engine new head gasket and engine gasket set, getting ready to put new head gasket on and the shop manual calls for cylinder head guide pins witch idk what there talking about, makes sense to guide the head down on to the gasket what can I use as guide pins or are they readily available threw a vendor, second question thick copper felpro head gasket should I use sealer if so what's the recommended type of sealer used