The booklet,
Accessories for your 1968 Pontiac Wide Track shows the 571 code for buckets, 572 for bench. See photo below.
The
1968 Pontiac Sales Manual price sheets shows code 571 as head restraints for $52.66 but does not list 572.
However, this list of codes was created from the "
1968 Pontiac Sales Manual listing all options and accessories that were available on the Pontiac Firebird" It shows only the code 572 Head restraints.
See:
https://firstgenfirebird.org/1968-info/1968-technical-information/1968-options/#564 "
The Definitive Firebird Guide 1967-1969" shows only code 571 as "Head Rest Bench".
Clear as mud? I can see why the codes don't match on your car's specific documents.
