Indeed, the reason I so much prefer "close the blast doors" to be IN the original film, is that every single time I saw the film in the theater in 1977, it led to audible laughs in the audience when the "open the blast doors" line followed.
According to The Starkillers Guide, the 'close the blast doors' was only in the rare mono mix of the film. You were lucky to have heard that version when the film came out.
PD