Now it does seem that the afterwards yrs in which you could get different colour interiors, they utilised the normal highback buckets with the inside armrest and no side bolsters. My interpretation of the brochure is always that any 'silverado' cloth inside can be ordered with the 454SS as long https://claytonyfkdh.ttblogs.com/10301815/a-simple-key-for-454ss-seats-unveiled