Thanks Bill,
Have you read Robert Temple’s “The Sphinx Mystery,” or “Egyptian Dawn”? He discusses first hand observations of sites that have not been investigated since the early 20th Century as well as how dating is done and how out of wack it is.
Most of the dating is clearly disputable and far older that consensus history claims.
Much of the foundation dating rests on Old Kingdom Egypt Kings Lists, the major one being a 19th Century forgery bought in a bazaar; while it is a known forgery, it is still used to date the Kings. The Palermo Stone which is real, lists Kings on the first row (the oldest) which are completely unknown, and many of the others who are known are missing, and so on.
Worse still, bio-thermoluminescence dating (the date that a stone was placed) of the Menkaure pyramid (the newest) is almost 1000 years older than the consensus date of the Great Pyramid, the oldest. Bio-thermoluminescence dating is now illegal, unless done in Egypt which does not have the equipment to do the tests.
If you check out the movie, one of the things discussed and shown by video/photos/diagrams is the discovery that metric units of measure were used as well as geometry that was thought to be discovered many centuries later by the Greeks.
Also goes into dates and construction methods. In all it kinda hits all the points of unknowns about the pyramids and tries to put them into a coherent theory.