Okay, I have two questions. First, is it possible to convert my coil springs to a T-Bar set up? Also, if its not, can I achieve 4 inches of lift with the bigger springs instead of the spindles?

 

No on the torsion bar change

2" to 3" is possible but 4" and over runs into new spindles because of Camber

The spindle needs to be parallel to the road for the wheel to sit flat on the road, this is called the Camber of the wheel

Read here on camber adjustment: Ford Ranger Front Wheel Alignment

There is "some" adjustment, but even 3" lift can be a problem
For suspension lift you are moving the spindle farther away(lower) from the frame/body and it has a fixed pivot point, so at a certain point it can't be brought back to "level" so you will be driving on the outside edge of the tires

 

so just a spindle would lift my truck? I would also like to know, on an unrelated note, if I can do a SAS with the coil spring frame and start a 4x4 conversion.

 

No, a different spindle allows you to lift your front end higher than 2", how you lift it is usually with longer coil springs

Sell 2WD truck and buy a 4WD, or buy a rusty/wrecked body 4WD and swap your body over, and do a body lift at the same time

4WD conversion can be done but often not very well, lol, frame needs to be boxed in the front and 4 wheel alignment is very hard to get right in DIY shop

 

Alright, thank you for the answers, I'm really just building a show truck in the long run, the light off roading I do 2wd should suffice