The system is fairly straightforward...if you send in a pump Doc B Racing will service it to bring it up to optimum specs and convert the pump for use of an external PRV.
pump service($100) + external PRV ($130) + average return shipping ($15) = $245
You source oil filter relocation kit and girdle with bung welded on for return line from the external PRV.
There are some pics of the system in #268 of this thread and a diagram of the system in #284. The oil filter relocation parts are available from Protege Garage, Jegs, Summit, and ebay. We may soon have an aluminum block adapter available (part of the oil filter relocation kit).
Regarding the pan...it really depends upon the type of driving you intend on doing with your car. If you expect mostly straightline driving with little g loading to either side or front/back then there is little chance the oil pick-up will get uncovered and the OE system will most likely be sufficient. If you intend mild g loading that may see minor movement of the oil in the pan then an AWR pan would help. If you expect moderate g loading then I would recommend a pan with a gate system built into it similar to what we run on our race motors to prevent uncovering the oil pickup as the oil sloshes inside the pan.
Hope this helps???