Background: When I purchased my car (1969 SS) the previous owner had already modified the motor and left the return fuel line disconnected, Currently it has an RPM Performer intake, Holley 4150 double pumper, and the single fuel line runs from the mechanical pump, through a clear inline filter, to a hard line with a "Y" fitting that supplies the 2 feed lines to the carb. The original fuel filter is still hanging on the front of the motor, no feed line attached, but still connected to the original return, the feed out of the filter is just left open. Having this disconnected fule line / filter seems sloppy to me so I'd like to clean this up and eliminate the filter and return line as far back as possible.
From reading other forum posts I've learned that some SS's (325 & 350 HP) had this return line to prevent vapor lock, while other's (375HP) didn't need it... so do I need to reconnect it? What would be the right way to plumb this? (I haven't seen this Holley set-up with a return on other cars.)
Or if I don't need it and just disconnect the return line at the bottom of the engine bay, where it exits the crossmember, will I have a potential fuel leak? Since this line goes all the way back to the tank at the sender does it also go down into the fuel where it can act as a siphon? Or does it stop at the top of the sender where it would act as another vent? (By the way, One of my 2 tank vents are open but the other was plugged with a screw, no idea yet why.)
Sorry for long post but I'm concerned about the potential danger and what to get my facts straight before I do anything stupid (like usual).
From reading other forum posts I've learned that some SS's (325 & 350 HP) had this return line to prevent vapor lock, while other's (375HP) didn't need it... so do I need to reconnect it? What would be the right way to plumb this? (I haven't seen this Holley set-up with a return on other cars.)
Or if I don't need it and just disconnect the return line at the bottom of the engine bay, where it exits the crossmember, will I have a potential fuel leak? Since this line goes all the way back to the tank at the sender does it also go down into the fuel where it can act as a siphon? Or does it stop at the top of the sender where it would act as another vent? (By the way, One of my 2 tank vents are open but the other was plugged with a screw, no idea yet why.)
Sorry for long post but I'm concerned about the potential danger and what to get my facts straight before I do anything stupid (like usual).
