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 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?
The FIRST thing I will mention, is you need to know HOW your engine was ballanced, was it internal? Was it external? If external, how much weight is needed on the flex plate. The factory 5.9 magnum and the 360 LA version have DIFFERENT offset weight... 318s, steel crank 340s were internal, aka "neutral" if you don't know how it was ballanced, your making a mistake!