904/999 Starter and Flexplate issue solved

Duane said
I think part of the issue is the size of the converter flexplate bolts.
My bolts are 7/16 I believe. I thought the oem 904 used much smaller bolts. I believe that Turbo action who is closely affiliated
With mopar performance standardized the bolt size and pattern used for a performance application.

I think you're right. It makes sense to standardise them and the 7/16 pattern in the same diameter as the small 5/16 pattern. Which means it won't cause interference issues with the starter.