which torque converter is compatible with Magnum crate engine?

Thanks again to all of you who have been so generous with information...I feel like I'm learning but the frustrations are plentiful. :)

So I brought home a lightly used Magnum 5.9 Crate motor which came with the flex plate (thank you, Dave).

I'm planning on bolting it up to the A904 that was behind the original 318...
...so I understand that I need a weighted torque converter...is that right?

Can anyone confirm...and if so, reccomend a decent one?

Secondly, will it bolt right up to the flex plate or will this require modifications?

Again, thanks a million, guys!! :prayer: