On page 36 in the 1973 Challenger Operators Manual it states.......
TRAILER TOWING:
The Maximum Vehicle Capacity must be decreased an amount equal to the trailer tongue load on the trailer hitch.
Page 58 is dedicated to TRAILER TOWING. States maximum trailer towing is 1500 lbs.
Trailer brakes are recommended for all trailers with a GROSS TRAILER WEIGHT over 1000 pounds. Etc, etc, etc
I wonder if their is a fender tag code for a factory tow hitch?