I meant the 2004-2004 vs. next generation in line2002 and 2004 are technically the same generation, but some consider them the 1 and 1.5 gen. To my knowledge they are mechanically identical except for 10+hp in the 03 & 04 that Nissan squeezed from somewhere lol. Other than that, same suspension, similar interiors, etc etc. It's mostly cosmetic stuff.
In short, a lift kit for a 2002 will fit a 2004. Whatever year you can get with lower miles and for a good price is the one I'd go with.
Gen1.5 Vs Gen2
I get it, I bought the Gen1 (2000-2001) because its cheap, cheap to mod and if i dent or scratch it I wont cry. I keep looking at the Gen2 for the Extra HP and overall looks but fear things like timing chain failer, and Smod.
My 200K gen1 has gone accross the country Flawlessly.
But if your really looking for a truck to mod like crazy Id buy a wrangler.