1963 1/2 galaxy w/427 side oiler?

hello, i am looking at buying a 1963 1/2 ford galaxy with 427 side oiler engine. my problem is that i do not know much about the side oiler. the vin says it should have a 390 in it. is there a place where i can check the casting numbers on the engine block to make sure the engine is what the owner says? i have looked all over the internet and can't find a engine decoder for that year or model. any help would be appreciated. thanks in advance.



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