Guys, When i finally get hold of a 2L block/crank/pistons for my MK1 conversion! I was going to put my "PB" hydrolic head on it.To do this i was informed to use the later oil pump that has more pressure to supply the hydrolic tappets. what if i use my old "DX" mechanical head instead. Would using the later higher pressure oil pump without the hydrolic tappets cause a problem with too much pressure in the engine? While i'm waiting for the block to come up i dont Know which is the best head to put my attention too. Anyone any ideas on this? Domma.......