I just got my 65 mustang running and when i put it in gear and give it some has I hear the flywheel touching against the starter. I shimmed the starter with a washer and it still does it. It appears that the welds on the ring gear of the flywheel are hitting something. I grinded the welds down and its still doing it. What can I do? Any more washer to shim it make the starte grind on the flywheel. Thanks in advance.