66CC bore with Polini 72 corsa Head

[edgargonz]

Looking for some insite I have an aero with a dd50 motor 66 bore, shop installed, and 72 corsa head. Another 66 setup I had used the stock head, mechanic said stock head no good for 66 bore, she runs but will lose power, loss of compression?, or seize............any thoughts............would be appreciated