A play on words as usual. A barn find in my opinion is the first sight by the first person. Then it becomes a barn found. If actually in a barn of course.
A box truck find I have found is a 46 Chevy coupe 4 miles from work.
1 mile North of that sits(I think, not found yet) a 65 Riviera. 2 4BBL, A/C, leather.
And the last I have yet to find the barn is a 66 L78, 4spd Chevelle.