Let me step back and say, if this were any other motor, most in this thread would offer our condolences and wish Dover well. While not bulletproof, these engines are strong. Don't take anything posted as an attack towards any of your skill sets.
The horse looks like it is walking in front of the carriage again, let us know how everything turns out.
Since this is a turbo build, the source of the crankcase vacuum would have to be sourced on the intake side, pre-turbo, or post turbo, exhaust. Not only that, but both methods have to be routed to create a venturi effect, because of minimal to no vacuum between the filter and turbo inlet / exhaust track (usually includes a 1 way valve). The caveat, in the intake method, can be the contamination of the MAF with oil, which is bad, mkayyyyyyyyyy. On the other hand, sending oil into the exhaust doesn't smell/look pretty either -- at least it will take longer to rust.
If it becomes a problem you could use an electric pump from the LT1 motors, on a Hobbs switch to pull vacuum when in boost. They usually provide about 2" of vacuum -- not much to help with HP, but you won't have any oil problems. If plumbed with a catch can that’s sump is plumbed to oil dipstick spout to allow drain back, you have a care free, closed loop system.