Stop in for a cup of coffee

WV64Signet said
OK...I dread asking this..

Both 273s.

One is dated 6. - 3 - 65
The other is 2 - 4 - 65

Are the blocks the same?
Is the 5 just "missing" off the other?

View attachment 1716029596

View attachment 1716029597

The 2-4-65 block is for the 65 model year...

The 6-3-65 is on the cusp and could be for the late 65 model year or the first run of the 66 model year...

If it is for the early 66 model year, it may have a few "updates" that they made...

But they should be the same for the most part.... Most likely they are just different mold cavities...