Re: Windsor engine no./id question.
A good resource is "How to re-build Small Block Ford engines". by Tom Monroe, published by HPBooks.
Honestly mate no RTA bloke is going to pick any external difference. A trick is to make sure your inlet manifold is aftermarket, or genuine Ford 289 as it is cast into the manifold as 302 or 289, but this could always be argued.
Come on Windsorphiles any othe differences?
AUIII XR6 Ute
66 Mustang convertible
AUIII XR8 Sedan