so ive got another wierd problem with this 72 240z of mine. when i get going abut 60 mph it soundslike a lawnmower and boggs down till i get to maybe 45 miles an hour. But it cruises just fine at about 50-55. oh and it does this up hills too. i can take hills only about 25 mph. all of my emmisions crap is removed. ive replaced my fuel pump and filter, flushed my lines and cleaned the parts on the tank that the fuel comes out of with a clothes hanger and compressed air. pulled my carbs apart and cleanedthem out. steve at z therapy set my float bowls for me. and i replaced my points and checked my timing.. still does it... anyone have any idea what i should try next? someone suggested that i need a new distributor and that pertronix kit would fix this. But its pretty out of my budget right now unless i have to. well any advice would be appreciated:) oh by the way it idles good and drives just fine in the city.