i have an automatic GT with a Vortech at 8psi. i have no problem spinning the rear tires from a stop. i can even spin them from a 35mph roll. and i still have the stock 3.27's. a forced induction Mach 1 is going to have a ton more power than my car. if you just get forced induction, you will have traction problems. if you get FI and 4.10's, you will have major traction problems. 4.10's are worthless if you can't get traction. they will especially be worthless with FI.
get FI first! get a feel for the car. you will probably come to the conclusion that the stock 3.55's are plenty. you will already have to shift fast enough. but if you do decide you still want 4.10's, you better build up one hell of a rear end to keep you from just spinning. IE: wider rims, bigger tires, upper control arms, lower control arms, springs, sub frames.