Thanks for your help guys, but I think I might leave it until tomorrow and look on Autodata instead. I can appreciate what you are trying to say about going clockwise, but trust me, it would not work on the D25/30 Engines. If I was to do it how you guys say, the head would warp slightly and I would be left with that stupidly annoying head gasket "tick" noise that is common on the D25/30's.
Thanks again guys.