How do i spot a 327?

[bowtieride]

So i called this dude about a motor for $50 bucks, and he said its a small block that he thinks maybe is a old 327. Is there an easy way to tell without looking up the casting numbers. I'm looking for a SB to put in my '70, and i thought a 327 would be cool. I would just go look at it, but its about 30 miles from my house. So if theres an easy way i can ask him over the phone to check something, that would save me from going out there myself. Thanks