Header evac with mufflers

This won't work with full exhaust, designed for open headers. I would just run a pcv valve or run hoses from rocker covers to a vented puke can. Mount it on fire wall above rocker covers. Be sure your rockers have baffles to control the amount of oil puked out. Be sure to put a drain in bottom of can to drain.

Any place in the exhaust that pulls a vacuum on a tube in the exhaust flow will work.
Before the baffled mufflers will cause a backpressure instead of vacuum, but after the mufflers will work just fine.
The vacuum won't be as high, but that could be a good thing if sucking oil droplets could be a problem.