With just a few mods like gears, you're in stock 5.0 territory, well, at least until you get to 100, then the larger displacement just beats you down.
Yeah, it can be close as far as the 1/4 mile goes stock GTs can trap 110. Z28 trapped around 109 all NA (before ported intake manifold, i thought may be higher now) and he has every bolt on under the sun. Hard to make up 100HP NA with a smaller displacement engine. Still though, a few boltons can put the 3.7 in the low 13's, as far as most cars on the road goes, that's quick!