Chuck,
I would also add ....when you remove and replace your rocker assy. run the bolts out ,and back in one turn each bolt at a time....so as to avoid flexing or even breaking your rocker shaft due to uneven pressure imparted by the valve springs.
I also , very carefully put a small bead of hi-temp sealant around the waterports before reassembly.
And .....DRAIN your radiator..! Aquart of coolant in your crank case can really spoil your fun.....
KK