What is it? I know it came on the early 3rd Gens, but what it? How does it work, any pictures??

 

It was GM's first halting attempt at a "performance" electronic fuel injection. It was basically 2 of the TBs like a Citation or something would have had, mounted on opposite sides of the intake, such that the one on the left fed the right bank and vice-versa. The runners are about a foot long and REAL small, around 2/3 the size of the 305 head intake ports. In the years it was available, the LG4 was rated at 145 HP; the CF at 160 HP; and the L69 at 190 HP. The computer was extremely crude, like the carb ECM, so it's very difficult to reprogram.

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