Got to take the 70 out today for its longest road trip since starting to put it back together, about 6 miles. I couldn't stop shifting gears, man that 6 speed is nice, I even accidentally went from 2nd to 5th one time and the car just kept pulling right along like it was nothing. But back to my question, I'm noticing now that the disc brakes are harder to press, and you really have to press on the pedal to get it to slow, could I still have some air in the lines, is this a symptom of air in the lines. The master was off the car a long time but I bench blead it and the lines. Or could this be the cam Lunati 60204. Help with some suggestions would be appreciated. Also when I got back home I noticed oil comeing from one of the valve cover filters, how can I stop this.

I don't know the specifics of your cam w/o looking them up...but my recollection is that if you have a really lopey cam, you may not be generating enough vacuum to help w/the brakes...in which case you might need some vacuum assist.....maybe someone else w/a bit more experience w/this can shed some more light on the subject...good luck...

If you don't have 17-19 inches vacuum, your gonna have some pressure to apply to get stopped.

I had this very issue with my 4-wheel discs on the 59.

After some engine work---I managed to get the vacuum up to around 16-17, therefore having a good assist once----If I am slowing, the reserve is depleted (from the booster) and again--no power assist.

I have a 7" booster, single diphram, which is NOT the best choice to stop that big ol 59 Elky. But, it is all I could use, as valve cover clearance AND the hydraulic clutch slave are both within 1/2" of the booster (1/8" for the master)

It is my intention to get a 7" dual diaphram for a bit more assist.
It would probably be in your best interest to use the largest booster that was available on your car (larger booster=more pressure assist), check for vacuum leaks.

Also when I originally ran the 4 wheel disc setup the vacuum was pulled from the back of the quadrajet that was on the motor, now I'm pulling vacuum from the intake, could this make a difference.

a rock hard pedal and not stopping well is a sign of not enough assist. Or, if manual brakes, a master with the incorrect bore. Sounds like yours is not enough assist due to low vacuum. First thing to do is see how much vacuum you have going to the booster. If you have a mushy pedal, thats air in system.

How about installing a Hydroboost system, would this solve my problem?

How about installing a Hydroboost system, would this solve my problem?


Absolutely, if low vacuum is the problem and not air in the system.