Two '69 RR 4-speed A/C cars I know of (owned one of them) that were original/never-rebuilt/unmolested cars had the turquoise 330HP motors. Mine was St.Louis built, don't recall where the other one was built.
This topic has come up before, and there are a couple guys with orange motors in '69s with AC and IIRC 4-speeds, and they were adamant that their cars were original.