Did Chevrolet ever put out a 1974 ss El Camino laguna?

No, Chevrolet did not offer a 1974 El Camino SS Laguna. The Laguna was a distinct body style offered on the Chevelle, not the El Camino. While the El Camino shared some mechanical components with the Chevelle, they were separate models with different body designs. The El Camino SS was available in 1974, but it didn't have the Laguna styling.