You have the rare V6 4x4 with V5MT1 transmission and 4.22 gears. Anything other than a replacement 6G7* from a Mitsubishi will not work with your current setup. Honestly if you want to have a 4g6* in there then get an 89 or older. What I think you are missing though is that torque will be better with the V6 and all of your drive train components are beefier as well. You can still get great fuel economy with a V6 and have plenty of power. I’m a turbo guy myself but decided to go 3.8L with MIVEC. Best decision as it bolted right up to my existing 3.0 bellhousing. Now there is obviously more stuff to tackle but it’s all doable and reliable. Don’t be close minded. Get another V6 and enjoy.