Lowering Questions

[Ochre Ogre]

I have a 1971 C10 with 15" Torque Thrust Ds with 8" wide 3-3/4 offset. 255/70R15 tires. I am planning on getting 2-1/4 drop spindles on the front from Brothers and 3" drop springs for the back and need a little input:
A) I know I need shorter shocks for the rear, but do I need to relocate the shocks as well?
B) Will I need an adjustable track arm with only 3" drop?
C) Stock length shocks up front okay?
D) I have read that there may be rubbing on the a-arms with the drop spindles and 15" wheels, any one know if this will be an issue

I don't want it slammed I just want to bring it out of the air a little. I still want to be able to haul a load of dirt once in a while.
Thanks in advance.

Tim