Re: New to big Jeeps
Are you looking for a wagon style body or a pick-up style body? The J-series (J-10/J-20/J-2000 etc.) are pick-ups the numbers specify 1/2 ton 3/4 ton etc. If you are looking for the larger version of the xj you would be looking for either a pre- 1984 Cherokee (two door), 67-84 Wagoneer (four door) or 84-91 Grand Wagoneer (four door luxury). Motors vary (especially on the early models) but the 258 inline six and the amc 360 v-8 are prevelant.
Aftermarket: Lift kits are available from Skyjacker, Rusty's, etc. Most lift kits are offered in either a kit or a system. One has front replacement springs and rear blocks, the other has replacement springs front and rear. Rear blocks=stock ride but limited articulation. Rear springs=harsher ride but better articulation. Body lift kits are available from a couple different places. Killer32 makes tubular bumpers, though most guys make their own.
I would avoid pre-1975 vehicles as they tend to not have as much available (all around parts and aftermarket) and require more custom fabrication to make things work unless you have good welding/fabricating skills tools.
I hope that helps
Phillip J. Van Why
1985 Jeep Grand Wagoneer