For the front axle you will need: Dodge steering arm, re-do brake lines, shock mounts, and address U-joint using either bastard joint or changing either pinion yoke or drive shaft yoke. The 4" lift may allow you to use the stock length front drive shaft.
Rear axle: Brake lines (have to do anyway for disk brake conversion), possibly adjust spring perches (perfect time to make any needed pinion angle adjustments), and drive shaft (shorten) and U-joint. Great time to do a U-bolt flip and shock mount relocation.
U-bolt plates can be home made rather easily. One ton axles are SO worth the trouble.
Completely changes the ability of your truck to survive abuse when combined with reckless abandon! 
Rear axle: Brake lines (have to do anyway for disk brake conversion), possibly adjust spring perches (perfect time to make any needed pinion angle adjustments), and drive shaft (shorten) and U-joint. Great time to do a U-bolt flip and shock mount relocation.
U-bolt plates can be home made rather easily. One ton axles are SO worth the trouble.
