4 lines from camaro gas tank ?

[harley rider]

our 39 chevy has afuel tank from a 87 camaro . there is 4 lines coming from the tank one is presure one is return one apears to be a vent one went to a vacuume canister.I am doing away with canister that was part of the TPI motor that I am replacing. the question I have is do I really need to use this vacume if the tank is vented. I am thinkin this is not really needed.

 

[ssimpala]

No, you don't need it. Are you using the in tank electric pump with a carb? If so, you are going to need a pressure regulator.

 

[TiredIronGRB]

No, you don't need it. Are you using the in tank electric pump with a carb? If so, you are going to need a pressure regulator.

And a return line back to the tank.

 

[harley rider]

No, you don't need it. Are you using the in tank electric pump with a carb? If so, you are going to need a pressure regulator.

I have a mallory bypass regulator that I kept off our dragcar that will be used.this car had a tpi motor fuel lines pressure and return already installed.just wondered about that 4th line and wanted a second opinion. thanks.

 

[twistedz]

I just vent the 4th line like I do on a fuel cell, with a check valve.(all tho probably not needed)