Hey guys, background on the car: 73, l24 with weber downdrafts, 280 dist. of an unknown year, Timing is at 14 at idle, and an Electric pump at the rear. Problem: Ill be cruising at freeway speeds(60-75) and the car will just lose fuel delivery. You can hear the carbs sucking in air. IT will buck as it gets the occassional taste of fuel. Ill have to limp my way over to the side of the road. Add fuel with my little 1.5gl gas can. Luckily I have made it to gas station each time. My gas guage doesnt work by the way. On top of that I only get to drive about 40-60 miles each time before this happens. Which means im only getting 6-8mpg. Im trying to get this fuel delivery problem solved before I worry about tuning the carbs. Ive replaced the front fuel pump, fuel filter, plugs, cleaned the rotor. So any help on what I should be checking out would be appreciated...