I've got the usual clicky engine noise on my ST200 , pretty much every one says its the common head gasket fault.

The car's done 130k so i've decided to get the head gaskets done anyway , although i'm getting our family mechanic to do it , is there anything else i should look to do at the same time , i.e parts being removed so might as well clean them up , manifold gaskets etc .
i know its quite a big job so i'd like to get as much done in that one hit as possible
Cheers
Dave