Hi pennidogg, You might want to contact WSB Sponsor Ventana Construction.
It sounds like you are planning on building the garage yourself, and Ventana regularly has Workshops, (free, I believe) for folks.
The page I linked to in their name has a couple examples of garage rebuilds they have done.
I have to give the disclaimer that I have never used their services, but a good friend of mine, and WSB regular poster, is currently getting her house rebuilt post the fire that damaged it last year, and I think she is truly in love with them ;-).
Mike