When I chanced upon this great image of Captain America pencilled by the late and great Jack Kirby, I was mostly entranced by the outstanding inking. The inker is not indicated, but there's little doubt to my eye that Dashing Don Heck is responsible. Heck did quite a bit of inking for Kirby toward the end of his stay at Marvel when he was producing his portfolios and things and this seems to be a product of that period.
Kirby wanted to bring the painfully underrated Heck over with him to DC to work on the Fourth World stuff after he'd kicked off the concepts. He imagined he'd be not unlike Stan Lee I suppose, overseeing a bullpen of talented artists working on his concepts. But alas DC didn't share his vision and pretty much began to undermine his efforts from the get go. Much to the detriment of talented guys like Don Heck alas.