YOURE good
I do recall the comics by Marvel with the big WHAT IF titles
Do you remember a comic or short story about a giant robot or alien that lived forever? circa 1966-67
thats all I recall, Ive wanted to find that comic for a long time
ooooh - tough one. There were several that that could fall into:
DC side: Mystery in Space (probably not took a hiatus in ‘66 until late 70s), Strange Adventures seems likely, Unexpected, House of Secrets or House of Mystery (all 60s before it turned horror in the 70s, Mystery is unlikely as Dial H was running at that time, Secrets was running Eclipso then took a break in ‘66 until ‘69); all the Weird titles and From Beyond the Unknown were early 70s so they aren’t it.
Marvel side: Tales of Suspense (no that was iron man and cap by then), Monsters on the prowl, Creatures on the Loose, and Fear weren’t. early 70s so not it.
Unless it was a Charlton or something other than Marvel/DC I’m going to say it was either Strange Adventures (188-204) or Unexpected (92-103) for that time frame.
I don’t have the issue so that’s about the best I can do if your years are right.