2 Fuel pressure regulator hoses

[240sxkody]

I have a 90 240sx and am just about done with my blacktop sr swap. It seems that there are two hoses that go to the fuel pressure regulator but I don't know where the second one goes to.

[compactfean]

Large outlet is the fuel return line, small nipple goes to vacuum source on the intake manifold.

[240sxkody]

Which vacuum source is it

[compactfean]

If I remember right stock intake manifold would have it right under the throttle body but it really doesn't matter, just had to be manifolds vacuum after throttle body.

[240sxkody]

Ok there's also what looks like a vacuum source or a return at the back of the mani by the firewall

[compactfean]

If its decent sized then that one goes too brake booster.

[240sxkody]

Ok but the hose for the brake booster isn't long enough to reach it so just get a new one

[compactfean]

Well it should go intake manifold up to check valve on the fire wall, then booster.