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