Sorry Alan,
I thought you might have the standard (large)MSD pro-billet distributor,
not the 8579 smaller profile unit. The 8579 fits will plenty of room to spare on the CAV GT-40 I worked on. Your car must be tighter.
The Mallory Unilite has the smallest diameter and height of all the aftermarket distributors available. If that doesn't fit you will be hard pressed to find something that will. One other solution, as the other members posted, is a DIS set-up. Elecromotive makes a neat set up and has all the components for a complete small block Ford installation. Check out
www.directignition.com for details.
HTH,
--Mike