1969 chevelle ss 4spd with 427

[cuda]

Hi everyone,

I am going to look at a 69 chevelle ss 4spd car tonite. It is advertised with 427 motor. I know it is a long shot and most likely a later conversion but what should i look for on car and paperwork for copo. Also what codes verify a real ss 396 car? What would value be for a real 393 car with a later 427 swap. thanks phil