[Spridgets] rocker shaft and head studs..correct procedure

[Andy Webster]

Ok! 
  So the 1275 is in and it runs... it sounds a bit tappetty , so I am going to swap the rocker assembly with the one on my 1098.
  Both are pressed steel type of rockers.
   
  What is acceptable procedure for this?
   
  Should I undo all of the head studs, in the reverse order to that which I tightened them...then change the rockers? do I need to fit a new head gasket?
   
  OR
   
  Should i just undo the studs that hold the rockers on, then change rockers and refit the nuts and retension?
   
  cheers
   
  Andy
   

       
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