So i want to put a ported and polished head on my y8. In addition to a new stage 1 cam and gear, would it be neccesary to upgrade the fuel system? and if so, would just a new adjustable regulator be enough? Will a y8 IM fit on a Z6 head?

 

yup

 

its not gunna be nesesary, but would probly give you a fyew extra hard earned ponies.