Probably better for him to ride it a bit and figure out what type of foot pegs he wants before modifying the position.
The controls on the Widey are pretty much "out there" as they are.
I found that a chuncky peg with a flattish top and angled right for support to the bottom of the foot worked well for me. (Aerofoils)
He'll know himself after settling in if they gotta be moved and by how much.
I'm 6'2" and like you I'm still hoping to get to 6'3". I'm 53 next week though so I'm starting to lose hope. I have a 2010 and a 2011 Wide Glide (long story) and the forward controls are just perfect for me.