I might be wrong but I think the book engine mounts are more or less OK as is
Why do I say this !!??
The book was based on the Pinto engine.
I had originally tacked my engine mounts up exactly to the book spec.
Test fitted a CVH engine, The only work needed to be done was to slot the holes
Now I am going to go the Zetec route. Test measurements show that by fabricating engine mounting arms to suit the Zetec engine & the book spec mounts will be fine as is.
If I were to produce a chassis for re-sale, I would slot the enine mount holes as a matter of course.
I'll try to post a picture as soon as I can
Aftermarket Zetec engine mounting arms are available, off the shelf. Cost an arm & a leg for what they are though