In this case, Journey Into Mystery #83.
The original cover was created by Jack Kirby and Joe Sinnott, copyright Marvel Comics.
The mini series I've been working on are super big, this is 18x24 bristol.
I have to use reading glasses, so I don't get eyestrain! ;)
I re-pencil using a lightbox, but all the inking is freehand with a brush - so at least everything is in the right place. The rest (inking) is just lots of practice trying to get details the same.