Hi,
Body lift wont help a sausage with towing as the tow hitch comes off the chassis.
Suspension lift on a leaf sprung is very easy, just need a set of shackles, size of shackle controls the lift. Of course most folk off roading want extra height so they need the extension on top of normal height and I would recomend for them to buy new leaves too.
If your not going off road, and its sag in the old springs, you may get away with lifting the springs pm Fuddy he has a spare set he may sell. That or get in touch with Milner off road and ask them for a price on new springs.
Fronty no.4, pimp mobile Treg 3.2 LWB lifted 2.5"
Fronty no.5 2.8 swb hd coils +2" 31"machos.