the head gasket set will probably come with ALL the gasket's you will need. for example, to replace the head, you will need to take off the valve cover, and possibly other parts that require a gasket. the kit will take all the guess work out of it. all the gaskets you need in one package. now, don't go out and buy the value pack. invest in a good high quality gasket. make sure you get a service manual so you know how much to torque the head bolts when installing the new gasket. i don't know weather or not foam comming out of the radiator would mean a blown head gasket. i would get a professional opinion before you do all that work. i don't know for sure though. also, that gasket kit may come with a gasket for the thermostat housing, but use RTV instead. i have heard it works better, and that is what comes from the factory. best advice i can give you, mark all the bolts and shit you take off. keep all like bolts in zip lock bags to keep them organized. mark all electrical and vacuum connections. while you have the head off, why not stick in a 240sx cam
? I think the pre 1989 240sx were SOHC. any cam from a SOHC 240sx will work. direct bolt on. You can get me on AIM. my screen name is DeathToDomestic, and you will probably get a faster reply than waiting on the forum.