The LT6 and LT7 are not part of the LT V8 family. See Oldsmobile Diesel V6 engine

Oldsmobile Diesel V6 engine

Oldsmobile developed three diesel engines for the 1980s: two V8s and a 263 CID V6. It was based on the Olds 350 V8 with a bore and stroke....

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General Motors' Generation II LT is a small block V8 engine. Making its debut in the 1992 Chevrolet Corvette

Chevrolet Corvette

The Chevrolet Corvette is a sports car by the Chevrolet division of General Motors that has been produced in six generations. The first model, a convertible, was designed by Harley Earl and introduced at the GM Motorama in 1953 as a concept show car. Myron Scott is credited for naming the car after...

, the new LT sought to draw upon the heritage of the ultimate small-block, the 1970 Chevrolet LT-1.

A significant improvement over the original Generation I V8 is the Generation II LT's "reverse cooling" system, allowing coolant to start at the heads and flow down through the block.