Ron,
I'm working on this right now for my 7A. Download and print the 7-page set of installation drawings from Andairs website. The one thing not shown in the drawings for all the "A" RV models are the brake lines that run under the front floor cover alongside the fuel line. You'll have to cut or notch the angle stiffeners to allow the brake lines to run underneath them. I don't have any pics yet; progress has been very slow for me lately because of work and other pressures.
One of the best documentations I've seen, though, is on my friend Steve Lynn's site. He has lots of pictures of his installation:
http://www.mykitlog.com/users/displa...=96145&row=116
Good luck on yours!