i bought a '68 Cadillac Calais not to long and am trying to figure out the engine that's in it.. was told it's a 472 but i have have reason to believe it might be something else.. i got casting numbers for it but don't know where to look them up.. also the numbers are kinda hard to read at the end so i don't know if i have them all.. the numbers i got off of it are 9179038.. i also don't know if the engine in it is out of another caddy or not.. if you can help that would be great.. thanks for your time

It is a 472, unless some switched it!!