pretty rare because it is the first year that caprice had a box
Extremely rare. Production of 77 Caprice ragtops (AKA Convertibles) is 0. If you're asking about landau roadster vinyl tops, they were very common. Probably installed on more than half of them.
1977-85 Impala, 1977-90 Caprice
Any 1977-85 Impala or 1977-90 Caprice will work
How do you install a starter in a 1977 Chevrolet Caprice Classic with a 5.7 liter motor?
Caprice Coleman was born on 1977-03-20.
No
Doors from a 1977-79 Caprice or Impala would be interchangeable.
A 1977 caprice was using the same 267cid engine as the impala at the time, wikipedia says it had around 170hp.
Any other grille from a 1977-79 Caprice/Impala would be a good fit
None of the US coins dated 1977 are rare.
Any windshield from a 1977-85 Impala or 1977-90 Caprice. A contemporary GM B-body (Buick LeSabre, Olds Delta 88, etc) should work also.
1977-79 Caprice Coupe were the only years for the squared off rear window.