Anyone know the outside case diameter of the switch pitch 300 and 400 converters? Probably picking up a 400 trans soon and the guy has converters too (I want the looser 300). I just want to be certain how to identify the switch pitch 300 vs 400 converters besides the obvious “ this one is bigger”. Dimensions, even pictures would be very much appreciated! Also, I will have the trans rebuilt but wonder if the converter can be used as is or perhaps tested.