I honestly dont have an answer on the mount thing. I'm doing the opposite so if you dont have plans for the I-6 horns, I'd be interested in them.
I would also be interested in seeing pics. If you dont already, get a Photobucket acct and it'll let you post them in your threads. theres a good sticky at the top of the general discussion page. Sounds like a nice ride. One day I hope to have a Javelin or AMX to pull behind mine. I have a friend here that has a 9 second AMX, I love seeing it and would like to see yours as well.