I did mine back in 2004, and it's definitely worth the trouble. 28mpg on the highway, more power than my TPI engine across the board.
The process is well documented on thirdgen.org's Engine Swap forum so go have a look and see if it suits you. The only tough parts I hit were:
1.) engine mounts, getting my old ones out was a pain.
2.) I did the wiring myself, spent a whole weekend staring at diagrams mapping the '82 chassis and '01 engine harnesses. And then another weekend fabricating a mini-harness to connect the '01 to the '82.
3.) fuel system was a pain, had to swap in a GSS340 pump to make 58psi and then add a regulator under the hood.
Pics are at:
http://www.warpten.com/carpics/ls1/
http://www.warpten.com/carpics/ls1_0214/
Good luck!