OK, I'm an idiot and I asked the right question about the wrong monkstrap shoe. So let me start over.
"Hey Warwick Norwich owners, I have a fit question. My high instep and wide feet usually need 511 or 678 last with a blucher lace. Any thoughts on how a Warwick Norwich would work?
Thanks for the forbearance and answer.
Norwich is on the 2 last, which has a low vamp and very narrow toebox. I would try it on in person before gambling.