84 K5, manual tranny. Granny gear plus 3. 1st and 2nd are now ok, shift to 3rd and step on it and it stumbles until I pick up more speed then it smooths out. Bad wires? Cap?Rotor? Timing? Had the timing at 10 degrees before and put it back to 4 degrees and the stumbling that I had in 2nd gear is gone. Now 3rd is still a problem. Thanks!! It's FREEZING in South Korea! It's so cold that even the ice has ice!