I have a pinto head i need identifying,,im told its a burton fast road head from about 10 years ago and it has a blf40/41 cam with 44mm valves..Theres a number on the rocker cover gasket which is 18274 and 062 and the only other numbers i can find are 838161 which is under the head gasket...I spoke to burtons who said it could be stage 2 leaded but unsure as theres no letters any help much appreciated
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