SWV stands for Something Weird Video. A search for that gives the usual IMDB page with full cast & crew etc. Following all references to female cast members reveals nothing regarding the ID of the redhead. However, a bit more digging brought up a download link for the full film. On that page was a comment saying effectively that an uncredited member of the cast was Lee Germaine - definitely a redhead at some point in her career & definitely busty. Entering Lee Germaine The Muthers as a google search & you'll come up with a link to a clip. I downloaded it & there she was in the opening scene.
God I'm good.
UnID med nat retro redhead in 'Muthers' 8mm loop Pal replies: as ever, I'm humbled by your considerable sleuthing skills karlos! Thanks!