Thanks Lincoln
The heads have the rectangle with a pointed (triangle) center on it. I went out to the shop and took the valve cover off of the passenger side. this is what I found.
Between the #2 and #4 cylinder rockers: the number 8785888, below that in large capital letters, an A at 12:00, an N at 03:00 and a D at 09:00 with an arrow pointing at the N at 03:00 A
D >N
Between the #4 and #6 cylinder rockers: CANADA
a square box then a 2 then GM
Between the #6 and #8 cylinder rockers: a circle with 12 dots and an arrow pointing at 09:00. Then C 17 5

back in the house looking at vin decoders, the 8785888 doesn't come up anywhere, maybe that first 8 is a three, but I wire brushed the heck out of it. I have no clue what: A
D >N
means.
CANADA and GM are pretty much self explained, but the square box and 2, I have no idea.
The circle with 12 dots and an arrow pointing at 09:00 could be the shift start time or the casting time, not sure. C 17 5 is March 17, 1965 I think.
Anyone know a website with a good Canadian decoder. Maybe thats why the number on the engine block tab is strange 80 549915.

Again, any help in decoding this mystery would be appreciated.

Thanks Dale

Remember, for every mile of road, there's two miles of ditch!
If you fall on your face, you're still moving forward.