14 years ago in PONTIAC
I saw a picture of a california 72 trans am with the letters SD next to the 455 on the hood cowl,is this a custom job car like a shelby?
Answers (3)
Thank you! Correct information is always a good thing! Mark
Super Duty is the correct term for SD but the Super Duty wasn't available until 1973. 1971-1972 had 455 HO or High Output engines.
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