I gotta say, usually I'm not one for weathered engines, but those dirty chrome valve covers look exactly like they should after years of oil, grease, fingerprints, dust, and dirt on them. Nice work.
Holy carp this is exciting news! I haven't picked up a new release in years but have always kept an eye open for a new tool of a 70 Cougar Eliminator, 71-73 Cougar, 71-73 Mustang, and 68/69 or 70/71 Cyclone Spoiler. Prayers answered!
What's the method you use to shape the new windows? Do you used a vacuform machine to pull the glass over the mold, or just heat it with a hot air gun and pull down by hand?
Unless Revell has fixed the mold, which I doubt, you'll find that the passenger side quarter panel extension doesn't come to the same pronounced (and correct) point right above the end of the bumper as the driver's side does, and could use a little extra plastic and reshaping.
I wish Revell would fix the mold for the body. If you look at the rear "cap" just behind the quarter panel and above the rear bumper, the driver's side comes to a nice sharp point, while the passenger side looks like it was dropped and dented. The mold has been like this as far back as I can remember, back when there was only the Boss 429 kit in the 1980's.