i probably know the answer to my own question but just to get the doubt out of my head as far as the procedure, is it the same>? and would i get any advantage over the d16a6 block since mine is a ZC as far as i know the zc head has more aggressive cams is that where the substantial power gain in horsepower comes from>? or is there a slight difference in blocks to attribute to the horsepower difference between the A6 and the ZC