Check the actual measurements of your door opening, Mike. It could be a bit less than a full 8'.
Official manufacturer's height of a 16'
Casita is 7'8", and
Casita mounts factory AC through a front closet on the 16'er. Official height of a 16'
Scamp without roof AC is 7'10". Early units had factory AC installed in a side closet; sometime(?) they switched to a roof mount. As far as I know, both specifications have remained unchanged over the years, subject to minor variations.
Since both are close to 8', and since modifications (new
axle, larger
tires,...) can affect the height, you'll want to check each unit you find on a case-by-case basis.