bolt on up grade post

hi, i am lookin for a post that was recently on the forum. it was in regard to upgrading hp on a1600 twin port, without any machine work. can anybody help me out, i have looked back but cant find it. thanks greg

this one ?

http://forums.aussieveedubbers.com/viewtopic.php?tid=86088#pid803201

thanks craig, i told a friend to check it out, he prolly put his own post up cause i think he lookin to do more, heads etc.