543 RB External Oil Line [ Info Needed]

Like Famous Bob stated you probably need an external pickup and different oil pump. I currently have a Milodon 31015 deep pan with a single pickup with a Milodon 21001 pickup adapter on the Melling HV pump. I ported the adapter to make the inlet flow better (in my mind's eye). The adapter, like the stock system feeds the pump on the block side. To get more inlet flow they make different covers that include a pickup so you can feed both sides of the pump lobes at the same time (dual inlet). That needs a second oil pickup line. I just bought the cover and pickup in the classifieds in case my 540 loses oil pressure over 7000 RPM (if the motor wants to rev higher than 7000) and I have to add the outside feed to the pump lobes.

The 21001 adapter spaces out the pump so you have to use a longer oil pump drive shaft.

There are probably a lot of better ways to do this.