Cracked 360 Magnum Flexplate

Yes you are correct, B&M does not make the 360 magnum to 904 flex plate any longer, stupid I think. I have used the 360 magnum to 727 flex plate and trimmed down the nose of the starter to make it fit. But as said above Turbo Action makes one and would probably be the cheapest way out. Also if your changing out the convertor you could just have it made to the magnum balance spec and use the neutral flex plate. Just make sure you know which year 360 magnum you have they are not all the same. It would be the same thing in the end.