Possible Missing Vacuum Line December 02, 2008, 08:30:42 AM I have a 1987 thunderbird drivetrain im putting in an 88 bird. I beleive I am missing a vacuum line. The lines I have from the 87 motors connect to the thermactor(sp?) and other unit of the passenger firewall, run up the firewall and two plugs connect to the back of the motor. Is there supposed to be a line that conects to the vacuum tree somewhere?Where are these lines getting the necessary vacuum to operate? I haven't tried starting it, I'm just thinking it may be wrong. Anyone have any pictures of the wiring and such from their 87 5.0 SO? Quote Selected