Yes Heppy, if you do catch some perch that big, please post all kinds of fotos.
If I caught any that size, I'd be eating them, not stocking my pond with them. Ha! I'd consider pond stocking of some 14" or so. Remember, it's mostly great feeding opportunities throughout the entire lifetime of a fish that is mostly responsible for it reaching its maximum potential. Sure, genetics play a part, but those good genetics likely exist in many of the YP from that BOW.
An example is Cascade reservoir in Idaho. 2+ pound perch have been caught there. Some age classes in that lake have perfect feeding their entire lives. Other fish born in other years aren't as fortunate.
Regardless, good luck fishing for those jumbos.