Doc Olds has an outstanding sticky post on this very subject (engine stumbling).

Doc, where is that sticky?

 

H3 Throttle body and MAF sensor cleaning

 

Depends on the fuel you put in your rig..

Not all fuel is the same!

Read and learn:

Top Tier Gasoline

 

I did not think the u-joints were serviceable, as in there is no grease nipple? Replaceable, yes but not serviceable- am I wrong?

 

yes they are replaceable, as your millage go's up they should be replaced, A lot of times you will notice a clunk when shifting from park to drive or a squeaking as you start rolling at slow speeds, If you are not sure have a local shop check it out for you

 

its all preference you can buy spicer greasable if you play in the mud and wish to push water out later, or nongreasable because you feel the zerk fitting weakens the cross when they drill the hole in it. My own opinion moog sells greasable and the cross is forged. Summit carries them if you cant find them anywhere else.