hi i am useing the 84 cc E-heads with a 12.5 to 1 ross dome pistons.and on spark plugs i use cut back electrode spark plugs.champion C61CX plug.now with the dome pistons at tdc with a champion C61YC you could not remove the plug.because the electrode would hit the dome.but i would say go and try it.oh yea my 440 block was not a zero deck block.good luck on what ever you decide to do.mopar65