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I personally like the all motor LS7 with heads and a cam and LongTubes. That motor never feels sluggish to me, pulls hard all the way to 7k. I also have a Caddy CTS-V Wagon with the supercharged LSA with a few bolts on putting out 630 Hp, at the motor not tires though. And that car does really well too. I'm not a big fan of putting a charger on the LS7 if that is what you are thinking of. The block and cylinders aren't really designed for boost, from what i've read on. Either way you go you will love the new Z28, but agreed it could use a little more power.
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