Tired of my 350 and looking to do a cummins conversion in my 99 K2500 LS 4x4. It's the old square body style with stock t case and IFS. I plan on doing a SAS but I'm not sure which axel to go with. Not looking to go crawling really plan on this truck to mainly be a daily driver and a toy on the weekends. Also I would like to drop a manual transmission in so I don't have to deal with any electronics. would a wrecked 1st gen be my best bet and just swap everything over? what else would be needed if I did get a complete cummins for the swap? Any help is appreciated.