now i was just thinking about the engine and thinking what mods i could do to the original engine. right now im modifying the air intake to get more air. about half the vacuum lines are disconnected but still runs fine. if anyone has any ideas i would like to hear them.

Are you seeking power? Then go FI and turbo using Starquest parts. Or Weber and do away with the Mikuni. If you want a reliable truck, leave the engine alone, just freshen up the vacuum hoses and such.