Yeah, LS1+T56 doesn't even add that much weight to them. The motor sits behind the front axle for the most part too, so the weight distribution is hardly upset.
Its amazing what an all aluminum well engineered motor can do
We will be 4g63'ing it!
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420A > LS1 > All Else
Superchargers > Nitrous > Turbochargers
I > All else