WHY low vacuum on freshly rebuilt motor?!

65Val said

Well, low compression + big cam w/lots of overlap = low vacuum.

Did you have this cam in the engine before the rebuild?

Where's your initial timing at?

Click to expand...

Cam was reccomended by comp cams for a very mild street cam. Do you agree with their reccomendation? Timing is 36 all in. Vacuum does not change no matter what i do to the distributor. No this is a new cam, everything in the motor is new.