I recently purchased this engine and would like to build it to it's factory configuration. Cummins S/N say's it is is a 1985 NTC 475 Big Cam lll with MVT, however I am missing the twin turbo's and piping as well as the Jake brakes. Exhaust manifold is there. So far I have been unable to find these pieces. What turbo would be compatible with this configuration? Also considering using a N14 CAC and intake manifold as opposed to the water/air. What model Jake's fit this engine? Thanks in advance for your input.