Evan -
You are right. There IS only one 427SO - the one that came in the original car.
Oh wait! You say that your car came with out an engine? Must be a replica or a continuation or a whatever but it is not an original.
In my opinion, it doesn't matter if you put a side oiler or a Shelby engine in a car that is NOT an original.
Of course you can say it over and over and over and over BUT IT IS NOT AN ORIGINAL. Your desire to make it as close to an original as possible is fine - good for you. But it is not an original.
PB
