The engineering number for the D1OZ-10317-A is D10B-10317-AA. I cant say what the difference is but with the different part numbers and different engineering numbers there is a difference for sure. And keep in mind that a D1OZ was originally a Torino part or designed for a Torino but used on a Mustang for some reason.
I have access to a low mileage original 429 convertible and can look at that this week to see if the shield is still there and take measurements if needed.