Dana 300

[Joe]

 Dana 300 +  95 YJ 4 cyl (auto)= ?

  I know I need to change output shafts, just wondering is it feasible?

[crazy4ink]

your dana 300 should have a 23 spline input and your tranny should have a 21 spline output.  Check with Novak and/or Advance Adapters.  They should have what you need.  Not sure, but you might be able to get a 6 cylinder auto tranny and swap the output shaft to what you need.