Is this the link you are referring to: If you don't have the issue (which I doubt you do)
Luckily I do have a link to the December 1982 issue, below.
Click here for the 1982 issue of Popular Mechanics
If you go to page 102 all the directions and plans are there.
Edit,{sample} I right clicked and 'saved as', then opened it, enlarged it and took a screen shot...might work for you
worth a shot if you're not into buying the issue as Larry mentioned.