Recomended flex plate and torque converter for my 5.9 magnum engine

The motor is a MRL BUILT : 318 mini stroker 356hp/426tq
5.9l crate 360 magnum engine ( external balance ) is what he told me is the parts source I needed for my drive train
I was going to go 4 speed, but decided I'm going automatic transmission.

No race application just around town fun car so a 2400 stall converter would I'm sure be perfect
I've got a stock 904 transmission

Just looking for the right combo and some part numbers to help in ordering

Somebody got to have something like I have?