Just a quick one, does anyone run these pistons as ive just bought a set and supplied by my engine builder, ive just rebuilt the whole engine to find out the pistons are touching the ridge of the combustion chamber, the piston comp is 7:5:1, just wondering as the standard pistons are tappered around the top and these are not, so they must need the crown re machining am I right on this, buy the way theres plenty left on the head and im using a standard ford gasket, not a spacer, any help appreciated.
Tel