I know this is an old post but seeing that the thread has come back to life, Yes, I have one of those in my '30 and it works fine.
I didn’t see anyone answer who’s casting the new boxes here in the states. It’s Neal Jennings / Neal’s Hotrod Parts. His boxes are Hudson design and they are the sh!t. He’s a member here on the HAMB . I believe his email is nhrp32@att.net . Contact him if you want the best
As was stated numerous times in this post, Randy Gross is the man for F100/Model A conversions. I am just making new boxes for 32-34 Fords, nothing for Model A's. At one time "Hot Rod John" Kovar was casting a new F100 style box set up with a Model A style flange under the EZ-Steer name. I was recently given one, so I need to take it apart and see why everyone said they were so bad.