Is it any good

If the converter you're yanking out is a factory stock converter, and not something that has been rebuilt a couple of times, there should be a paper tag on it. If it has the tag send me a PM and I'll see what I can find out about it for you. As I recall, they stalled around 2000 rpm. My BRAND NEW AT THE TIME 71 340 Duster stalled in that area. When I worked in the converter industry we needed a customers 340 converter core sent in as they weren't the most abundant converter around and were all custom built. Check to make sure the converter is balanced properly. Remember, Mopar had both cast and steel cranks. Hughes will tell you what the converter is actually for.