What are all the differences between the 4wd and 2wd heads,and can a wrc headgasket be re used,some people tell me i can some say can't.
thanks matt

 

of the top of my head here's a start: I wouldn't reuse any gasket!

no lug for turbo hanger on 4x4 head!
temp sender's switch located at the rear on 4x4, 2wd's are at the front!

 

some 2wd heads only have the 2 bolt holes machined for the 2wd stat housing whereas some of the later ones and 4x4 heads had 3, pretty much then what alyvn has said bar the combustion chambers being different, and the water ways on a 4x4 are better as they have more meat around them unlike 2wd ones!!