Still need the magnum flexplate?

Have to ask this.. If I swap a magnum engine to my Duster that I now have 340, what kind of converter do I need?? I have a rebuilt 904 and a TCI converter now.
340 converter will work just fine. One thing, you didn't state which magnum.... because the 318 mag and 360 mag are balanced differently. If you are talking 360 mag, you'll need the flexplate and balancer with it. I believe for the 318 mag, you can use the LA 318 flexplate and balancer