i just did the frame chop to my 94 geo, it was fairly straightforward, I stretched it 4.5" and lowered it 4.5", it was a very simple deal, however it involves relocating motor mounts, front body mounts, brake line brackets (The brake lines will not have to be modified, just the location that they mount through the body), radiator support brackets, bumpers, and extending the steering shaft and front driveshaft.
Its also a good idea to add a front strut tower bracke at this time....
Now I can now fit 35 x 13.5 x 15" tires on it with no rubbing lock to lock. (massive trimming in the front portion of the fender required.) But my normal tires will be 33" x 13.5" Pitbull Rockers.
The back was whole different can of beans......