Switching to FI on my 68. I have a tank with an in tank pump to install. I will run a new high pressure line for the feed and use the existing line as the return. To the question. I have an 85 Iroc TPI. When you turn the key the pump will run up to pressure and stop until started. I think with the 68 the pump will run deadhead against the regulator as long as the key is on with the engine not running. Is there anything available for safety purposes to kill the pump in a key on non running condition or a condition such as a line break when no pressure is created for a few seconds due to fuel spewing?