you need to feed thm oil pressure with drain return dont forget that
im lookin into it for a mate with a 434 small block dart , it has no vacuum at idle and it also increases hp when used on rocker cover to create vacuum in block but if you just diong it for looks i wouldnt ...
the vaccum for brakes on turbo still comes off intake manifold the hose its self should have a pcv style valve in it ... im using a r33 one