Rick..... an excellent suggestion. I'd presumed that as there was no spade handle retainer U-bracket, it was an A1 but if it has had new panels inserted, that bracket may have gone...as per the BO Stoplight bracket.
Ken
lolo....have a look at the front floor panels...driver and passenger sides. On early models there are floor drains like these in the photo. Later models had small louvers, like a metal lip, to drain the water. What does your vehicle have?
Also, on early models, the very first batch was marked "RUN-1" on the rear fender tops and back panel....other areas as well. You will have to look closely, the stamping may be hidden under the paint.