Engine Conversion (1967 Fremont El Camino)

Years 1967, 1970–71 Models 2 Factory citations 2

Also described as Monte Carlo SSMonte Carlo SS 454 package

Documented applications

Chevelle / El Camino

1967 Single-source

footnote-flagged in source (Canada/export, build-sheet/tag-only, documentation-only, or package base engine not reported as an option — see chevellestuff legend)
1970–1971 Confirmed

Monte Carlo

1970–1971 Factory-verified

LS5 454 standard, HD suspension, auto level control, wider tires, SS badging; TH400 only; 3,823 (1970), 1,919 (1971)

GM Heritage factory kit — 1970 Chevrolet Monte Carlo, p.65.
GM Heritage factory kit — 1971 Chevrolet Monte Carlo, p.14.

This page aggregates every documented appearance of Z20 in the Chevrolet reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.