The 62/65 is a stronger and faster spooling turbo than the 67/76 so you can run ultra low 10's to high 9's with the 62/65 with supporting mods and suspension. I wouldn't be surprised if we see a 9.8 from a 62/65 this Summer.
It sounds like you're a better candidate for any of the billet 62 combo's, if you BB than get the 62/65 to fulfill the maximum in turbo greed from this turbo.