Had my X heads ported - results

I have a nice virgin unmodified set of X Heads left:
$500.00 plus Freight

If Pistons are about .050(Approx.) down in the bore and 4 Valve Notches
they are 72 or 73

If Pistons are about .050 (Approx.) above and have only 2 valve notches
they are 68 to 71