Yeah, I'm not sure why either, but Marvel had Ditko draw eight issues of INDIANA JONES in the mid-1980s. Hey, at least it was Harrison Ford he was drawing, better that than Chuck No... What was that? Really? Okay, never mind...
#33 is Ditko's second last issue, beginning a two-parter that takes Indy to Scotland in pursuit of a stolen amulet. "Magic, Murder And The Weather" is 23-pages, inked by Danny Bulanadi, who did most of Ditko's Indy stories. I find Bulanadi's inks over Ditko kind of flat sometimes, but this is one of his better ones. A few bits even looked like Leialoha's inks over Ditko. Other parts seem a bit heavy, but that might just be satisfying the Lucusfilm people. The opening scene, with Indy being harassed by two Scotland Yard types and doing one of those Ditko double-takes in six straight panels is kind of funny. I don't really get a heavy feel of the 1930s setting like I'd hope for, but that might just be because Ditko's characters always look a few decades in the past.
[see the comments for more on the inking, which might be an uncredited Art Nichols on the last seven pages, and John Romita on the Indy faces]
The story is pretty much serviceable pulp adventure from Linda Grant, with Indy pursuing Amanda Knight, who's stolen an amulet for a mysterious employer. After various fights and attempted poisonings, he find her held prisoner, and confronts the cloaked figure who turns out to be a sorcerer, and also the brother of a villain from an earlier issue.