[SS427]

Impala427,
Your car was built in St. Louis.

"168877S112934"

16887=1967 2 door Sport Coupe SS V-8
7=1967
S=St. Louis plant
112934=The 112,934th Chevrolet built at that plant that model year.

Also on your cowl tag next to the Fisher Body number is "STL" which is also for St. Louis.

For parts, call the number that T. Billigen suggested. Also post and add on the Impala web site as well as Chevytalk.com.
Rick