1" dia (OD .065 wall alu tubing) is plenty big for fuel line to pump for blown, 3/4" for norm asper alc.
Simple tank test--- remove tank and set on bench outside, fill with water and open feed outlet and watch flow coming out the fitting, nice smooth flow and your good, surging flow and the vent is to small or blocked. I killed a fresh pump once by not checking the connection free-play after an engine rebuild and jammbed the impellor into the front cover, It would fire up just fine, but after the burnout it would loose just enough vacuum to allow the fuel to break seal. If you can spin the pump with your fingers with very little resistence, you need to send the pump back in and then check the spacing.
Long skinny tanks are not that good because the fuel "Head Pressure" is not that great (a funny car by example has great Head pressure because of the amount of fuel above the outlet) and the further out the tank is away from the pump the harder the pump works. You did not mention pump size, an 80A is a 6.5 gal and a 110 is a 13gal to which the vacuum signal is stronger.
Also when building a dragster tank and mounting it, its built in such a way that the front is higher then the back so that the fuel always flows downhill to feed the outlet and not relying completely on head pressure and vacuum. A trap door baffle in a long tank placed between 25%-33% of the tank length is essential. A proper vent should go from front to back and then "T" off the middle. When the tank is full, under acceleration the tank breaths from the front, decell and the fuel moves forward, breaths from the back. "Cork-screw" vent lines (if so desired) should lay flat, so they can drain, as mentioned, standing them up will become a trap and the tank will become a vacuum lock before it will suck the fuel out the tubing vent. Another issue we had on out blown alc dragster, was with humitity, it was so high that the air coming thru the butterflys would ICE them up and the engine would die. Come back to the pits and everything was normal, Since then would always carry a can of windsheild de-ice and give it a shot after starting. If this symtome persist, have a crew member stand at the wall where you stop to see if engine rpms increase, if they do its a fuel starvation issue, and he can quickly jump the wall with a primer bottle and feed the motor till the fuel catches up