i have a sy with 89 k miles. thinking about selling the complete engine,turbo,exhaust,engine harnest,computer,everything you need. the truck runs strong. ran a 13.17 @ 99 with a 1.74 60 ft. thinking about going to a ls1 set up. not sure what its worth. any ideas? it has an egr delete bigger water to air intercooler bigger intercooler pump adjustable fuel pressure regulator.