For the third time I have run out of gas. My 70 bronco has an aux and main gas tank switch on dash as well. The autometer guage is obviously off a quarter of a tank because I died on the road. The prev. owner installed it. When I ran out of gas I tried to switch over to main tank but could not get gas up to carb. even after i put two more gallons in the same tank that went out. Of course I took off air filter and added gas to carb and got the EB to kick. I thought there was a resevoir in the fuel filter or carb so I can switch tanks on empty and start the truck up. I also heard to position the filter higher. This is my first bronco so I am probably experiencing normal problems but does this mean a carb rebuild on my 4 barrel holley is necessary or is this a fuel line/ filter problem or even worse a problem I have to live with everytime I run out of gas? As always thanks in advance for reading.