Magnum heads

how do you ID a set of genuine EQ heads? ( a guy 1.5 hrs away has a set for $1350). iirc they have a wide flat area on either end of the head. I did note the peculiarities in the earlier pics & I am going to check the EQ heads that I do have. I did have a set of the bad ones from a ben gorman at promax. the intake holes did not even line up. he wouldn't take em back cuz I didn't have the OE boxes they came in.