There is a lot of information on this subject and I have searched the site and yes I own a manual. Here is the question. I have leaky base gaskets and need to replace at some time. I want to do myself and would like to look at replacing the pistons. Do I or should I have the jugs bored out or can I simply replace the pistons and rings with stock HD stuff. I am also interested in the screaming eagle heads. By the time I am done having the stock heads ported and value job completed I am close to the cost of new SE heads. Also If I have bored out what what spec is recommended, I want reliability above all. My bike is a 98 Fatboy with 35k miles and a Dave Mackie DM 500 cam, Mikuni Carb and Vance 2 into 1 exhaust. Thanks for the feedback