So basically I have replaced a large portion of this Truck last weekend.

Starter, Ignition Coil, Alternator, Master Cylinder, Fuel Filter, Distributor, Rotor.....

Mighty Max 3.0 - 4x4 - 160K

However the truck idles funny. It drives pretty great, but at low rpms it doesnt quite run right. A lot of vibration and sound.. but only 70% of the time. There is another 30% when it runs great, nice and quiet and doesnt vibrate.

I am thinking a timing issue? Or maybe the vaccum ?

When I start to give it a little gas it kicks in and runs like a champ.