Vic - I've got a Boomkicker model 1500. The rods that come with it are cut to length with a hacksaw when you install it. Here is a link to the picture of a J/30 installation from the boomkicker website.
http://www.boomkicker.com/Images/J30prof.jpg Go to this link and use the dropdown on the left menu to see specs, install info, etc.
http://www.boomkicker.com/ Bill
[This message has been edited by Rhapsody #348 (edited 05-27-2007).]