Somebody on this board always seems to know the obscure answer. I am hope this holds true. I have a 1968 Mustang Coupe with Original 289 C4. The Flywheel seems to be a 160 tooth but I can't seem to find a replacement. I only see 157 tooth.

Do I have the right one?
Can I use a 157 tooth?
If so, do I need to replace the starter?

Thanks