I have a 70 SS 402/350, th400, and a quadrajet carb and I cannot locate ported vacuum on the carb.
I recently installed a new distributor and currently have my initial timing at 16 degrees with a total of 36 degrees with the vacuum advance unhooked from the distributor and plugged.
The original distributor was hooked into manifold vacuum on the passenger side of the carb.
If I hook the new (MSD) distributor up to manifold vacuum, my rpms rise to close to 2000 because of the vacuum advance at idle. I thought the vacuum port on the front of the carb on the drivers side was ported vacuum, but I have vacuum at idle there too and my rpms rise when the vacuum advance is hooked up here also.
The only other vacuum port I see is on the firewall side of the carb and I have no vacuum here at all, either at idle or with throttle.
What should I do with my vacuum advance line to my distributor?