It is not just older cars. I have a 2019 GMC Sierra. It will not accept full throttle on the gas nozzle. I now just set it to the slowest nozzle latch on the truck and both of my 62 Pontiacs. Give it time to breath and it will fill the tank and shut off. Sometimes you have to try different rotations of the nozzle for them to work.
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If you built it, drive it.
red 62 Tempest total stock restoration.
white 62 Tempest modified, 61 389 Tri-Power, and a conventional drive train.
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