FYI don't use this style spin on block
http://personal.linkline.com/dbarton...erAdapter1.jpg
it will get loose and start to leak.
Mehsilvia - oilcoolers and blocks usually have female ports (1/2NPT) that you use the 1/2NPT-xAN adapters to attach your lines to.
Oilcooler NPT <-> NPTtoAN adapoter <-> AN fitting-AN line-AN fitting <-> ANtoNPT adapter <-> Oil block.