When I was a newbie this was an old school trick used by my driller at the time, he was taught by Ron Hoppe how to setup balls like this.
You do not need a longer pin but if shorter pin it will be pin under ring or bridge, it will increase the midlane reaction and backend. The cg will land right above the thumb hole and yes legal statics can be an issue with the wrong weighted ball.
We used this on a Pantera, Tiger, 3D violet all made me look like my rev rate went up 50-60 rpm's, at the time i was lucky to be 230-250 rpm area. I went from not being able too hardly wrinkle a ball to a decent amount of hook set reaction.
The one thing that you have to watch out for is the ball will just poop out with no oil, roll out becomes an issue because the core has used almost all energy early getting the ball to kick in.
generally games 1 and 2 were safe and game 3 was a ball change to something drilled pin high.
