you boys should check this site out and maybe speak to them directly.
http://www.acl.com.au/web/aclwebsite.nsf
btw, a friend of mine had a bad experience after his engine was built using ACL pistons, etc.
he has since gone back to using all genuine nissan parts and has had no problems producing and holding ~350rwkw.
nissan all the way boys if not going forged.. just had them in my rebuild not long ago didnt get to boost the bitch after run in but it seemed like i could of thrown a truck at her ;(