If you are getting fuel out of the pump but not out at the carb then it has to be blocked somewhere in between. I have not had to deal with frozen fuel lines before but here is basically what I'd try: Take the line loose at the fuel pump and the carb, get yourself a heat lamp or hairdryer and warm the fuel line up starting back near the pump. The water/ice should be sitting in the lowest point of the line or in any dips. Thaw it out and keep trying to blow it out from the carb end. An air compressor would work well for that. If you make it all the way up to the carb then it must have something more solid than ice blocking the line.
Just remember, water sinks in gas. Your ice will be in the low spots. You could even have some in the carb bowl so warming it up wouldn't hurt
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95 Isuzu Trooper Daily Driver
86 Isuzu Trooper reliable backup
77 LUV 2wd stock beltway blaster (resting)
79 4x4 LUV project: 2.6L, 5spd, 31s (eventually)
MEPR: Man, my 4x4 makes all other LUVs look good
