on a 3.0 V6???
intake manifold gaskets & plenum gasket should be all you need.
Unless................. you brake any of the hoses trying to get them off or back on. (very easy to do if there old.)
But if it were me, Id put serious thought into injectors & new gaskets for them wile I was there (unless the have ben done recently.) Valve cover gaskets too.... all hoses & possibly head gaskets if its been a long time. & anything else you can think of / afford to do wile its apart.....
Just saying, why have to tare it apart in a few months if its been a long time since anything has been done????????