Not sure what you mean by seriesII HQ. No such beastie.

You couldn't get retractables at all in 1974 (plated 1974, not 1974 model) on commercials. They became standard fitment though on 1/1/75. HQ didn't even have holes for them, 1974 plated HJ did though, but used lap/sash until 1975 calendar year.