School me on torque convertors

First off, Mopar does not use low stall speed converters in comparison to all other makes. The stock "low stall" converters are a good bit higher rated than the equivilant phord or chebbie. whereas the phord or chebbie will have a stock stall rating of generally around a grand, the stock "low stall" Mopar will be around 1600 as you described. The factory high stall Mopar converters were typically around 1K more than the low stall and in some cases, a little more. It's not impossible to see a factory high stall converter from Mopar flash to 3200 RPM give or take in the right application. My guess as to the why would be that most passenger Chrysler products had pretty high gearsets on the order of 2.76 and the extra flash speed helped to get the car moving. Just a guess. Of course in a factory performance application, the reason was obvious.