i'm inclined to agree. hopefully they're right for the application!
i was given a set once that the PO swore were a-body. after two days of inventing swear words, boosting miller high-life's quarterly profits and breaking two hammers i came to find out, quite by accident, that they were for a B-body application.
after i cut them up into tiny little bits with a sawzall i told them i'd see them in hell as i threw them into the back of the junka-junka's toyota flatbed. then i promptly plunked down $900 for some doug's and that was the best money i'd spent since that kinda dough bought two quarts of bad gin, a 440 powered 70's monaco and the company of girl with colored hair that would only show you her tattoos one at a time.
