I recently purchased a 1971 Buick GS 455, Fire Red with white vinyl top. Interior is pearl white with bucket seats. Here is my VIN and Cowl Tag. 71 - 43437 - 1 - Z - 31793 TR - 165 - B80 - 75 - A 06C - 440056 - 640137 So I know it is 1971, Buick GS, 2 DR Hard Top, Built in Fremont, Cali. TR=455 165= Pearl White Vinyl Buckets 75= ???? A= ??? B80= Drip Rail Moldings 06= June C= Third Week Can someone confirm my external colour? Is it correct being Fire Red w/ White Vinyl Top? Or is it suppose to be Regal Black? Now my engine. After a ton of research on the site I learned that it is a factory service replacement block. BIEI 3589 1238861 (late 1971 - mid 1972). B=Buick I= 1971 E= Engine Plant - Is it Massena Castings Plant? OR Linden Assembly? 3589 = Sequence # Can someone tell me what a exactly a factory replacement engine is? And does this effect the value? I was told that this was a owned by a guy in Montana and was brought brought up to Canada.