We definitely need more info from ya!
If you stick to a 22re talk to ENGNBLDR, LC Engineering, DOA or any local motor rebuilder! They can get you 22re's that can push some serious power. A local kid here in town bought a LC stage 5 motor I think and had a local engine guru make it better, and now it's pushing over 200+ hp. That would be the easiest of any options!
Other than that, I'd go with a 3rz, with Marlin bellhousing, R151f tranny, and Off-Road Solutions has a wiring harness that will complete the swap. Just have to fabricate some engine mounts and some minor other stuff! Check out 3rz info at MarlinCrawler, Pirate, and various other sites!