Help

["twa1950" <twa1950@xxxx>]

Got a problem with my Gremlin that I need fixed before Wis. Car
starts and runs Ok but when you get it on the expressway and run it
for
a couble of miles it will quit running when you exit. It will start
right back up but every time it quits when you exit the expressway. 
Changed spark control box, replaced carb. with a rebuilt one from
autozone, and replaced rotor and distrib. cab. Any suggestions? I
thought sure it was the carb but since the second one is doing the
same thing I ruled that out. Could it be the fuel pump. 
Any help would be apprecitated. By the way it is a 78 with the 232
engine. 71,000 miles. Thanks gang. Terry.