I have a 1984 Chevy k10 SCLB 4x4 with the dual tank setup. It's got a 350, 600cfm edelbrock carb, edelbrock intake, and vortec heads. TH350, stock exhaust manifolds, true duals and flowmaster 40's. 12 inch lift and 39.5x15x15's. I think that about covers it. Here is my problem, The truck drives fine on a typical trip in town, but under heavy acceleration or high speeds it cuts out. The truck simply is not getting enough gas. When I originaly bought the truck the guy thought something under the hood was messed up because it would always die on him. I played with it some and found out it had a pinched fuel line above the as tank. However, it was not getting enough gas and it seems to be doing the same thing again. The fuel line is not pinched as I have followed it from tank to carb. The fuel pump seems to be working fine as I have an inline pressure tester attached to it. I bypassed the fuel tank select solenoid under the suspicion that gas was being restricted too much when it's going through the valves and such inside this selector. When I am driving, I can punch it and it will run fine until it pulls the bowls dry. Once the bowls run dry the fuel delivery system doesn't seem to be able to keep up with the carb and the motor starts cutting out. If I back off the accelerator and drive at a reduced speed for a couple miles I can then attempt to speed back up. I am beginning to wonder if the stock fuel lines and/or stock fuel pump may be unable to keep up with this setup? Many many people put similar upgrades on their rides and I am wondering if anyone else has had this problem, or if someone can offer any advice or suggestions.