I want to make my plane Jane 69 a Z clone, for the engine I have a small journal 327 and a steel 283 crank, what compression ratio would a 69 Z have had? so Ill know what piston and head combo to run. Im not trying to make a fake Z to sell to an unaware person so dont get to bent out of shape I just want a Z but dont want to remortgage the house to get one!