Difference in height between Amal and JS flat side

Hi, is someone could tell me the height (or the difference....!) between those two carbs: amal mk1, and Jim Schmidt flat side, that's mainly the height above the two head fixing studs /bolts , that I am looking for , as I am fighting with clearance trouble betwwen the upper parts of carbies and bottom of the tank ( on a Seeley MK2 frame which is not up to the "normal" specs, as noticed on most pics I have either from Minnovation or Homeslice, their carb , mainly Amal MK2 stands below the top of the horizontal frame rails , mine don't, so my question.............) ????