you could also try Rockauto.com. They have the headset for about $50 and the IMG set for about $20. You don't need the head set unless you plan on replacing the head gasket, which wouldn't be a bad idea.
It's not much more for the head set, but then you might want to replace the head bolts and install the valve seals that come with the head set. You might be tempted to have a valve job done and the heads resurfaced, but if they aren't warped I would not risk getting them ruined by a poor machine shop job.
Botth the intake manifild gasket set and the head set have the RTV sealer you need for the end seals included. Rockauto has the ehad bolts, distibutor O-ring etc.