i just rebuilt the carb now it runs worse

if I get this right its ok @city speed but rough and stumbles at higher speed. Does this car have a catalytic convertor in it? check for plugged . if poor running started after carb rebuild dbl check the float level and baseplate gasket . Obviously it must of been giving you trouble befoore you rebuilt the carb so definately pull the plugs and clean them- probably loaded up from prior poor running . What was the original problems b4 you built the carb?