I run a PTE billet 6262 journal bearing on my RB25. I can't remember what thread pitch the -4 adapter for the block is, but Raw Brokerage sells them. I used one of these flanges for the feed and pretty much the same thing for the return with a -10.
http://www.atpturbo.com/mm5/merchant.mv ... y_Code=FLG
Here is a link to the block adapter fitting on Raw Brokerage's website for the feed.
http://www.rawbrokerage.com/earls-4an-e ... rb25-rb26/
Now for the oil drain fitting, you will need a 3/4"NPT to -10 90degree. You can get those from Summit or Jegs. As for the length and the hose ends you'll need, that will depend on your setup whether you need 90's, 45's etc.