Yes I think there are mistakes but my mind is being refreshed brom the last time this came up.I think it depends on the carb on the car,mine is a carter carb which shouldnt be since they came with a/c only and then the engine would be turquios,it did have dealer installed a/c though,the holly engine was orange.Here's a quote from JS27NOB the last time this came up,man its been a year!
K, lets get away from the HP numbers. There were only 2 383's available in 1970, a 2bbl or a 4bbl. 4bbl was the N code Hp 383. it was 330hp or 335hp with a M.T.
The only way it should have been Blue from original is if it had a carter 4BBL with the A/C. Are you sure the car was never apart anywhere in it's long life? Might be one of those few exception stories.