Don't take advice from whoever told you that. I run 4.10's daily (stock w/ exhaust, but not for long) and it's awesome. If you don't care too much for mileage you'll be fine. You'll top out quick and go through 4 gears in the first 10-15 seconds. But when you floor it and let those rpms go up, it feels like a whole different car. People are dumbfounded when I tell them I only have exhaust and gears. lol.
Oh and a short shifter
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Oh, and you're speedo will be WAY off