Al, I can tell you from experience that the transformer should be checked by a sign shop before use. Maybe they can help out with the damaged and missing parts? As for the installation, Keep in mind that winds will definately be a factor. I usually pour a 2 yard concrete base. That's approx. 40 inches square and 48 inches deep. Be sure to tie rebar to 1 inch sign bolts. Make a pattern of the base in plywood and drill out the holes. Form the base and fit bolts using the nuts. Rebar cage should be below form and tied or welded to the sign bolts. Now is the time to run electrical conduit into the form and tie it where it should go. Pour concrete into the form, a little at a time, all around. This keeps the cage from tilting the bolts at odd angles. Once hard, you can pull forms, backfill, run electric and bolt up sign.