they wouldnt, but for a truck, you'll need a truck intake manifold to use truck accessories. Plus with the 6.0 instake manifold (IM), you get more low end.
Allen ran a 13.9 with a stock ls1, 6.0 IM, 6.0 exhuast manifolds, stall, his tuning, dual flows and a rigged CAI with stock farm truc tires and peg legging it.
But, if you wanna use truck accessories you need a truck IM, if you use camaro/vette accessories, you'll need a ls1/6 IM.
91 s10 - bagged and bodydropped...getting rebuilt
91 nissan - backhalfed and bagged