Congratulations ditdit, sounds like you raised a fine young man! Oh and nice car too...
Re:how many built daily....there are yearly production numbers for each model, I believe it's in the eaglepedia section. The variation in production numbers year to year for SWs surprised me.(IIRC, some years 5000, following year 20000). That doesn't answer your question, I realize, probably need someone who worked on the line to chime in.
I have a small cardboard sign (about 3" square) with 3 black numbers on it. It came with my 81 SW(I am 3rd owner). I think it might be the place on the line. I will dig it up and post a pic if I ever figure out how.
Good luck w the snow eagle!