I'm not sure the year of my .225 Slant 6 that sits in my '64 Belvedere. I know it's not the orignial. Is there a way to find out???

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

_________________
Lasse

Signet -66 225
Holley 600 Offy-5270 Dutra Dual,regrind. cam 272 0,420 110, head shaved 0.100 slight.ported
MSD6A
A904
7 1/4 3.23

Letter codes were still being used for engine date in 1970 (specifically, 1970 was "F"). So, this is probably a 1980 engine.