Converter Question

1971 CY Dodge Dart said
No manual valve body. So there's no way to know what converter is in there I guess? I was going to swap it out this Winter thinking it had an 1800 rpm stall but if it's more like 2400 rpm I'd rather leave it.

How does the car perform? I wouldn't worry about a arbitrary stall figure unless you feel like there is a issue, like lack of low end ect