Newer Aluminum W/P on '65 273 with A/C

Going Sanden for sure ,for the looks of being updated and I am sure the parasidic drag is MUCH less. Is it impossible to see the timming tab or just hard to see? I am going Electric Fans so I can CONTORT with the Timming Light to see it without fear of "Fan Rash". I can change the cover but would rather not, Daughter is getting after me to quit taking things APART! Ha Ha ..... Thanks, :D Tim (Dad)