Now I have a early pig that that had a long range tank in it. It was removed due to it being too big and smashing on rocks from time to time(and also the PO had it sandwiched in place with 2x4"'s). In my search for a good replacement tank, all I could find in good shape was off of a 1979. So I slapped it in and have been using it, but I have a hard time filling it up all of the way. Most gas pumps will shut off when the tank is around half full, like it is not venting enough when filling it up. My old tank only had two vent tubes, while the 1979 has 4 vent tubes to accomadate emission and evaporative junkola. I ended up just capping two of the vents and using the other two, venting at the upper portion of the filler neck. Does it matter which vent tubes I use? It's a little tough to see inside of the tank. Is there an inherent design that would require a greater amount of venting? Also, does anyone have a decent picture of how the tank should mount up? I've never had the chance to see a stock fuel tank set up. I mounted mine very securely and with a good ground, but I'm pretty sure it is not the stock configuration for mounting. If someone in so cal needs a long range tank (49 gallons), $100 takes it, as I don't think I'll ever use it again. Has interior baffles, no rust, is not a man-a-fre, but has no mounting tabs or brackets.