The return line is not pressurised. I'm going through the same issue so I will keep you updated. Right now the best I can find is this:
http://www.customsteel.com/sr20/html..._fittings.html
He'll give you the fitting with a straight or 45* -6 fitting. Then it's up to you to figure out how to get it into the block.
I'm working with Harp @ Taka Motorsports right now to figure this out. I'll keep you posted on what I come up.