hey guys i got a 2002 2500hd 6.0 project truck that i need parts for. I want to order parts from ebay and didnt know if i could order parts from ls1's or other motors. i can find these parts cheaper and easier on their and not sure if its because they are more common to search for and buy or if its different parts.

Heres a list of parts i need.

Mass Air sensor - ive seen some bigger "performance" ones will those work or actually add hp?
Crank sensor
cam sensor
spark plugs
coil packs
plug wires
throttle body

Also i need steering parts, tie rods ball joints, ect. are the parts for 2500's and 2500hd's the same? big price diff online.