your in for a lot of work if you want to do that, you would need a new 4x4 front axle and steering components, a transfer case, and most likely a new transmission along with new drive shafts, and a hole in your floor...with the price of the parts it would be cheaper to (assuming the body is in good shape on the truck) buy a rusted out junker with a good frame and drivetrain and drop your body onto it
158 oz
8.8
5.5"
Oil
from 89 through 1996 the rims have the same bolt circle and from 1997-2003 and 2004-2011. However, if the tires are larger than stock on the 4x4 you will probly have clearance issues on the 2x4.
5 ON 5.5
yes, it will fit
The headlight adjustment for the 1989 F150 2WD is below the actual headlight. You will need to pull the tab at the top of the headlight up to release the headlight and then you can adjust the angle of the light with the long bolt below the housing.
watch video on youtube.
Should be on the side or rear of the oil pan
No
no such relay.