1970 (4600 Series) GS 455 (37) 2 dr HT, Kansas Assembly Plant, Build Sequence 144788 (188) Black Vinyl Bucket Seat Interior (50) Bamboo Cream Exterior (B) Black Vinyl Top In the location of the "071" Kansas assembly usually has the build week stamped there. It would read 2 digits and a letter...example: 12B = 12 December, B second week.