Newbie needs help decoding!

I have (2)'64 GT's,one coupe & one convertible, they both have their orig. engines.
Both have casting #'s 2463430 -4 & -7(which is the station that made the casting).
I also have the orig. eng. from my old '69 dart custom HT,& the orig. eng in my '72
duster, which share the casting #'s of 2806380 -4 & -1.
The eng. I just pulled from an old 1st gen. valiant has casting#2202843,it's a 170.
The point is the engines are stamped at assy. for production in those days,and the
breakdown is,first digit is series(model year) next TWO 1st two of displacement,and
last paired group the date. A number to the far right of those would be the shift that
built the eng.,no number-1st shift, then 2 or 3 .
BOTH my '64's start with "V" then 22 (225) then the build date.Later engines also
went to 3 digits for the disp., and added a platform designation letter next,then the
rest as usual.This was done by '72,I mowed the deck on the'69,so I can't read that
anymore !:) But my auto encyclopedia stated the eng. ID stampings were changed
for the '66 model year,so..... somewhere in there. Either way THREE '64's and THREE
"V"'s says....... it's a '64 170, buy in confidence and enjoy!!
The factory wasn't in the habit of "pretagging" engines for future production,and
as my other two engines prove,castings were used multiple years and the date
isn't in the basic casting #, which are routinely revised and inserted into production regardless of model year. Cheers!!:coffee2: