Strongest Th-350 to go with??

[Project69]

I seriously doubt that my built 350 will be able to handle the big block hp and tq ill be getting so i want to know what company makes the best 350 tranny?

The engine is making 580hp and 591tq

I dont really want a TH-400 because of the increase of rotating mass, but if i need to just to handle this then i will. I wont be at the track at all because the nearst track is 2 hours away and this is my daily driver so its just to beat on mustang driving high schoolers lol

Thanks, Rob