2000 long bed rear leaf springs

[Slo Ranger Trk]

good day all -- need a little help and advise on what rear leafs to use... i have a bad back so most of my off-roading is just fire roads in th forest and easy out in the woods.. it has a 7.5 rear axle w/3:73 gears.. my p/u has the " camberg 5x5 " & 2" blocks in the rear ... the leafs are beat to death and i need some new ones... my question is, do i use the 4 leaf model, 4x4 rear leafs , or the explorer models ? i really just need a medium spring cause the truck never gets out of second gear ... i'd like to get a little lift, maybe 1.5-2.5" .... so any help or advise would be greatly apricated.. thanks all =)
you can reach me here on the forum or at slodrtlmfan@gmail.com