oil system, what to buy??

Oil Pump- Highly recommend a Melling HV pump. Think Melling makes the best pumps period. On a motor of this caliber why risk it with a stock volume pump. Oil pumps are cheap.
Oil Pan- A larger than stock pan is also recommended. The Milodon pan, if its the one I'm thinking of, Is wider at the bottom so has a larger capacity yet you still have good ground clearance. I've used this pan on 10 sec. engines.
Oil pump pick-up- use the one that comes with the pan.
Windage tray- Either one as long as you have one. I always used Mopar trays.
Distributor Drive- Use one with a hardened tip
Lifter valley baffle- Don't think they are worth the money or the hassle, but a lot of people use them.
filter relocation kit- can't comment on this one I've always run the 90 deg. adapter. I don't like having the extra plumbing in the engine compartment and having to snake the hoses around the headers and so-on. Also another place for a leak to develop.