I'm preparing to install a new tar top battery in my early 62 and may as well use the correct hardware this time. The Judging Guide is a little vague on a couple of points that I'd like to clarify. The J bolts that hold the retainer down are not threaded the entire length of the bolt. What is the correct bolt length and how much is threaded ? What color is the anti corrosion felt washer that mounts on the positive post ? What is a good source for the J bolts? Thanks Rich #2276