2100 Motorcraft carb on 258

[jenner104]

So we just moved to Colorado and were having some problems..everyone told us to get the 2100 motorcraft carb put on. So we did...but when underload and or cold days it studdards like mad.
We have replaced the distributer, plugs, wires, and ignition core. It has to be the carb at this point. Does anyone know what jet size? power valve size? and float level is suppose to be on this thing?

CJ5 1979.

[lah2420]

I heard the 2150 is an altitude compensated version of the 2100. Not sure exactly what the difference is though.