As far as gear ratios with forced induction....think of this....RPM happens REAL FAST when Boost hits....so....4.10's would theoretically run out of steam real fast as well and theoretically max rpm/gear ratio limited speed would as well....unless you had a OD trans of some sort.
Torque overcomes tall ratios with traction, so I would recommend a 3.00-3.55 final drive ratio with forced induction...for everday use.
