[THEFERMANATOR]

4L80E's didn't come out until 91, it is a turbo 400 with an overdrive and electronic controls. Most of the military 6.2's had the turbo 400 for a tranny, and civilian ones got the 700R4. They also came with the DB2 STANADYNE injection pump that is a pretty good pump, but they have quite a few problems with the heads warping causing hard warm starts or no warm starts. They usually would last 150K+ miles if cared for. The first 6.2's were only around 140HP, but they were offered from 120-160HP depending on the year, GVW and usage. The 6.2 was also known for the 0-60 in 5, that is 5 minutes or 5 miles. They are a good long lasting engine that can be easily turbo'd with OEM parts from a scrapyard(92+ 6.5's, swap the manifolds and install the turbo and intake). If you have any real specific questions you can brush up over at www.dieselplace.com, or I can ask them over there for ya.