u all gave me good advice about what head gasket to use.thanks.should i use a thicker head gasket if the head is skimmed.the car runs t34 greens and 22psi. also my mate is building a new engine for his 4x4 saph cossie.he wants to run around 400 bhp.he talks about long studding the block.does he need it and what are the bennifits.any ideas on the best thing to do. and