eddy heads to low cc for me??

Without all the exact numbers it is going to be hard to tell but one good thing is the aluminum cylinder heads will absorb more head and you can run a little higher compression without any problems. Just make sure to check piston to valve clearance by using and old head gasket and some modeling clay. Bolt one for the heads on. Set the valve adjustment and rotate the engine slowly by hand after the engine has been rotated remove the head and check your valve clearance if it good I would run the heads. Good Luck