right ok doke,bought another rs with an engine knock, got it home,gt it started and relised it was the head,had spare head in my gargae so got on to replacin the faulty head,

took everything off put to tdc lined the head up,brand new head gasket and bolts, got every plugs n pipes back on, turned engine over by hand,all seemd ok dokey,

got it started was missing like fuck and not idling at all,while adjusting th dizzy cap i had the water cap off to let it self bleed,next thing i no the waters mixed with oil, mayo in oil cap, breathers all choked up also, took head back off but cldnt see anything wrong,got another brand new head gasket and wil rebuild again tomorow,

but any1 think of ther top of their head what it can be? ??
im kindoff puting it down to a bad gasket ?

im completly confused like

any help will be much apprecited

sean