im goin be rebuilding my 4x4 cosworth engine soon and im wondering what headgasket to use? group a or wrc multi layer etc im going be fitting low comp pistons maybe 7:2:1? as thats whats in now and what no the best headgasket, also best place to get all other gaskets from? ideally cometic

any avice on shops/ compression ratio and headgasket much appreciated

im after around 380 bhp allready got a t34 .63 and greys and usual stage 3 stuff