My '81 has an Andrews carb on it. Doesn't seem to run like it should. I can not find much info on this carb. What would be a good(cheap) replacement. S&S, etc. I don't know what cam the bike has, right now it has 1 3/4 pipes w/ mufflers but am gonna change soon. Any suggestions is much appreciated, as always with me now, money is tight. Thanks.