After recording Red, White, and Blues Image, producer Richard Podolor suggested to Steppenwolf that Henry would be a good replacement for departed guitarist Larry Byrom.

Henry was not invited to rejoin the band when it reformed to record Slow Flux and found out about it when new guitarist Bobby Cochran called him for advice, believing it was Henry's choice to not be a part of Steppenwolf.

Goldy McJohn, the band's keyboardist at the time, says Henry was fired because he didn't get along well with drummer Jerry Edmonton.

[3][4] Henry settled in Portland, Oregon, as of the early 1980s, and would remain there for the balance of his life.

[5] During his later years, Henry encountered increasing difficulties with seizures, which had originally appeared following a fall off the stage of the Whisky a Go Go.