Well no, technically not. If you have a 66% het unproven animal that your breeding to a normal the babies don't get percentages, they get labeled as "possible hets" which I have always taken to mean "probably not het". The safest assumption is that the babies will be regular ball pythons until you have proven the sire is actually carrying the pied gene. In which case you still haven't produced anything incredibly valuable, but that's neither here nor there.