I have a 47 cj2a, the problem I am having is a loss of engine power at high rpm or when the jeep is under strain. It will idle great and run good till I try and push the gas hard or try and power up a hill. I have a new rebuilt carb on the jeep so I don't think it is a clogged jet issue. My next thought was not hot enough spark? Possibly the timing on the cap could be tweaked a little. Any info would be helpful,thanks.