i have done 2 300tdi head gaskets lately , not a bad job , i would strip the head first and check its not warped, tends to be about no 4 piston they go
i used good quality payen gasket sets from the local factors they cost ?85 , you get the head gasket and the top end set seperatly, you can get much cheaper gaskets but beware.
check what gasket has been fitted they have holes punched to identify thickness last 2 i did were both 3's
you need a torque wrench and more important angle gauge.
the back bolts dont come all the way out because of the scuttle panel iif its a disco, so use an elastic band to hold them half way up the head when you remove and install it.
watch out for the little caps on the valves when you lift off the rocker shaft
