The below was something dizzyfugu repsonded to a question that I asked that was very similar...hope it helps!
dizzyfugu
Posted: 4/12/2007 9:17 AM
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For a skid/snap ball, I'd go with a longer pin, 3-5'. A high top weight can help, but is IMHO of secondary consideration since the pro shop can fine-tune most things through a balance hole or through deeper thumb or finger holes.
For an arcy ball, IMHO a 1-2" pin is best, and again top weight of secondary consideration, although a lower top weight might be preferrable since a strong drilling will put much top weight of a ball to the PAP's side and mandate a huge x-hole to get static weights back to legal.
Another inportant factor (maybe even more than the drilling and surely more than the top/static weights) is the surface prep. If you want a flippy ball, have it polished. A snaded ball will read the lane earlier, smooth out the breakpoint and make it arc. It does not necessarily increase the number of boards it will cover.