It looks like the Fowler had 2 1/2' between the screws and then I would not have to drill. That looks like a simpler sight . Also, the Lyman was on my list . However the guy at Winlliams helped me. I have a Williams sight on my Green Mountain and thought I could get a peep for the barrel but they didn't have it , or he didn't think it was made.

But the fruits of the spirit is love, joy, peace, patience, kindness, goodness,faithfulness, Gentleness and self control. Against such things there is no law. Galations 5: 22&23