here is some info that was just posted by Able Truck. the thing of interest is a ID tag attached to the engine - if is a NEW motor, it has letter N at the end, and a reman has letter A. so, when and if you get an engine from the customs, you might want to check the metal plate attached to the engine. see page 39 from the document that was posted. it has pictures that did not paste here...
Engine Displacement Identification
In technical literature usually only the group of 3 digits
that follow the basic engine code is utilized for engine
identification. These digits identify the required fuel
type of the engine and it’s displacement.
Engine displacement can always be determined by the engine specification plate.
This plate is stamped onto the engines in various locations. There is a lot of information
included in this identification plate. The breakdown of the information on this plate is as
follows:
powerplant Identification Number
30 8 S 1 11 A
Digits 1-2 are the displacement value of the engine:
30 = 3.0 Liter
Digit 3 is the number of cylinders:
8 = 8 Cylinders
Digit 4 is the engine concept:
D = Diesel (naturally aspirated and direct injection)
E = Fuel injection
K = Catalytic Converter (M10, M20, and M30 engines only)
S = 4-valve technology
T = Turbo (gasoline and diesel versions)
V = Carburetor
Digit 5 is a differentiation index:
Digits 6-7 are the variant numbers:
Digit 8 is the identification for the engine:
A = Remanufactured engine
N = New engine