The is the Engine Shop not the HiPo Shop.
Would normal Stovebolt engines have those 2000 degrees temperatures?
Probably would on heavy load. My Diesel runs around 300F at idle, and will hit 1200F. The pyrometer is at the outlet of the exhaust manifold. Gas engines typically run hotter than diesels. We had a Model A exhaust manifold cherry red once when the timing was too retarded.