QuestionQUESTION: I am having problems setting my timing and getting consistent performance throughout the RPM range. Also, I recently added an Edelbrock 4bbl 600CFM carb/intake manifold. Also, installed Headers (cheap ones). I was wondering which Vacuum port I should be using, Full or timed? Do set the Timing with Vac disconnected and plugged from vac advance or leave it on? Also, which would you think would be most likely to cause excessive play in steering....worn ball joints, OE bushings on a '72, or OE king pins on a '72? Would it save much work for me to do them all at the same time?
ANSWER: Always time your engine with the vacuum advance hose disconnected and plugged.
If you are refering to what port to run to the vac advance, they take a lot of vacuum to operate.
As for as the steering, this is not something you want to hunt and search on. Find what is causing excess play. It is usually very obvious to the naked eye. Is it in your worm gear in the steering box (very common in '72s)?
If your pins are worn out the tire will also move up and down as well as in and out. Jack the front end up and put a long bar under the tire and lift.
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QUESTION: Vacuum port - Yes, I was referring to which port on the Edelbrock Carb-Full vacuum port or Timed Vacuum port.
Are those steering boxes adjustable? I know that some Chevys were, just not sure about mine.
AnswerWe have always used full vacuum. May want to try both and see which gives you the best results with the set up you have.
If the problem is the worm gear, it is adjustable by the slotted screw with retaining nut on top or on some the side. Also, Fords have a cloth pad connector in the middle of the steering column that can wear out. It is visible from an inspect of the steering shaft closer to the firewall.
