One more time:
This is what D-Idiot wrote:
0225 R 1024 E
0=model year or plant number (1970 or 1980 if model year)
225=Cubic inch displacement
R= engine usage code:
R=Passenger car engine
1024=shift it was built on
E=parts ID code:
A=oversize cylinder bore
E= Cast Crank shaft
X=o/s valves
These numbers aren't entirely conclusive either in some cases, my 1974 block just says 3W 225 4 06 on the pad
(1973, 225, 406 shift code...)
Can't wait til you open it up and ring the crank with a wrench to see if it rings or has a dull sound to it....
Otherwise, a 1980 cast crank passenger car mill...
-D.Idiot