I've owned two 1971 birds with 455HO's in them. One was a Trans Am and the other was a Formula 455HO. Both were built the second week of February 1971 in the Norwood plant. Both cars had their original cylinder heads. Both heads in the Formula were undated. One head in the Trans Am was undated while the other was dated mid December (either L130 or L160, I forget which).
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