G`day Glenn ,
as said they`re the same thing and the other work quoted supports this so no confusion .
The design of these heads and blocks makes it almost impossible for them to leak oil alone without something else major being wrong .
If his reason for head removal is because of the oil leak only then it makes no sense to me .
If he said the gaskets need replacing because of a loss compression or a loss of coolant ETC then yes the heads need removing but not if it`s because of oil and speciall y not an oil leak .
A reason i`ve been interested in you problem is because we have a 3.9 that is leaking at the rear from above and at the filter and engine front .
Firsty i`ll replace the rocker cover gaskets because i can find oil along their under edges . then i`ll replace the inlet gasket and end seals if the leaking persists but i won`t replace the head gaskets and it`s done more Ks than yours and hasn`t been apart as yet .
Also have a 4.0 which is pressurizing the coolant system if worked hard , that i will have to replace the head gaskets in at some time but it leaks no oil and has less Ks than yours and has been apart before . When i have the heads off i`ll do most of what your man wants to do .
Have luck friday or at least hopfully they can explain better .
Cheers

