I got my head back yesterday and installed it. This morning I adjusted the rocker arms (I have hydraulic lifters with an adjustable rocker arm) then crossed my fingers and cranked it over, after fixing some bad battery grounds it fired up. My question is- the head had new valve guides, the exhaust valves and seats are all new, head had 25 thou taken off. I installed new rings and con rod bearings plus I replaced the timing chain. Should I follow any particular break in procedure? Should I re adjust the rocker arms after it has run for awhile?--Lenny