Here's the lead story from World's Finest Comics #268, May, 1981.
The art is credited to Romeo Tanghal, pencils, and Bob Smith, inks.
Tanghal is probably best known as an inker, particularly over George Perez on New Teen Titans, but is a talented artist who has done some penciling in comics for DC in the late 70's and early 80's.
Only one of those pencil jobs looks as suspiciously like the work of Jim Aparo as this one does. I could buy Tanghal swiping a few poses or faces, but I find it very unlikely that he would adopt as much of Jim's page layout style for a single story as I find herein.
Not every page looks like Jim's layouts, though. The page 1 splash doesn't look anything like Aparo's work:
Page 2, though? The poses, the rendition of Batman's cowl, the Dutch angle of panel four, the street light-illuminated overhead shot on panel 6, all scream "Aparo" to the experienced art spotter:
Page 3, and the layouts continue to look like something straight out of a contemporary issue of Brave & Bold:
There was at least one other comic book that Jim ghost-pencilled, that I hope to cover here once I get my hands on a copy, but it's a pricey little item that I haven't managed to snag yet.