427ci 400hp Engine (3x2bbl)

Years 1963–79 Models 3 Factory citations 3

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Also described as 427ci 400hp V8, Tri-Power (3x2bbl), hydraulic lifters427 CID V8

Also documented for Buick

Documented applications

Corvette (C1 / C2)

1967 Factory-verified

$305.50; 2,101 built (price and count: Corvette Black Book)

GM Heritage factory kit — 1967 Chevrolet Corvette, p.9.

Corvette (C3)

1968 Factory-verified

$305.50; 1,932 built (price and count: Corvette Black Book)

GM Heritage factory kit — 1968 Chevrolet Corvette, p.7.
1969 Factory-verified

$326.55; 2,072 built (price and count: Corvette Black Book)

GM Heritage factory kit — 1969 Chevrolet Corvette, p.84.

Impala / Full-Size

1963–70s (varies) Single-source

High performance 3-2 bbls

This page aggregates every documented appearance of L68 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.