If your friend wants a big bass pond, you guys should remove as many as you can including the fat ones. Get the total number of bass in the 2 acre pond down to about 100 bass and you will grow MONSTERS! Keep dinking around with should I release this bass even though he is fat, and you will grow some nice 2 lbers.
I can consistently grow bass BIG, but I cant do it as fast or easily with much more than 75 per acre. Your definition of BIG needs to be defined.