Ok My dad friend sold him a 93 suburban( 350 4x2) for 250 bucks. Real cheap, pretty much free. My question is what kind of mods could he do to it to make it more fuel efficient and more power? I know it doesn't have a pc to tune it so what are some options?

 

first thing I would do is all the maint. stuff....new plugs, wires, cap, rotor, air filter, clean the TB. Those motor's were never really known for fuel effiency