I would like to add a peep site. Is there any type you all recommend
The answer depends on how much money you want to spend. The one I would recommend would be a Lyman 29-1/2 or 30-1/2 because they adjust for windage. Slightly hard to find and pretty pricey.
There are also receiver peep sights that have adjustable windage but I'm not familiar enough to suggest specific ones. I like the tang sights.