stroke the motor ( what need to be done to the block for a stroker kit) eddy heads (out of the box)
you might need to notch the bottoms of the cylinders depending on what rods and stroke you use.
and eddy's out of the box is a bad idea - have them gone through by a machine shop - mine OOTB were too tight on the valve guides and had a bunch of intake valves with too much seat runout. They also had alot of left over chunks in the water passages from being machined at teh factory.
