As for your oil pan thats and easy one. bkg has the right idea, go buy any T100 3.4 2wd oil pan and pick up tube (dont forget the dipstick)
and your set. Now as for as that IFS stuff goes just dump it its no good for crawlin anyways. Ok so you dont want to do that yet OK. The only thing that I can think of is to get a tall suspension lift to get more clearance under the motor. And maybe ditch the cross over and have each side go straight back.