So you don't have a combo fuel/vacuum pump? Like pictured. The top part pumps fuel, and the bottom pump boosts vacuum to wiper motors, etc.
I've never seen a vacuum line connected to the crankcase. Not sure what that would accomplish.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
