DZ,
if you look at your post, you've actually answered your own question. The drills your dad has on his stuff aren't flippy at all in nature. 2 pm pins with cgs below, and/or pin below the fingers will promote quicker roll, subsequently taking some flip characteristices away........the Savage pearl has the correct drill and the correct ball for more flippiness so-to-speak.
I'd pick up the pin location to at or above his fingers, 1230 or 1pm position....and stack the cg below or just toward the grip center just a bit to get more flip.
Pearlized balls and/or polished solids will give you the best possibilty for flip. Savage flip may also be a good choice, ...also I believe the predator pursuit has a nice flip block as well....
If he wants something to turn, pearl....Roto Grip Silver Streak Pearl would be a nice choice, ...and/or the Pure Fuel....
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JEFF