Cadillac Trans bolt size?

Anyone know what size the two bolts to mount the tranny to the tranny mount for a 1953 cadillac are?

I can't find mine for the life of me and I need to get it bolted back up so I can get the drive line back in.

Probably a stupid question but I'm not sure how long the damn things are suppose to be.

 

I don't recall right off, but my best guess is 7/16 fine tread. I remember they're odd and most of the engine/drivetrain stuff is fine thread FWIW

 

Thanks. My buddy rustypipes said the same thing. I'll give it a go and let everyone know.