SB Balancers are they ??

[JohnZ]

Suffix code of block stamped Canada

Don't know what that might be; if it has a "Canada" embossment (raised cast-in characters), it's from McKinnon Industries; their production blocks had a "K" prefix.

[JohnZ]

small block hub only was on a 283 with a CAST IRON crank.

It's the other way around - forged 283 cranks only required the hub, but 283's with the nodular iron cast crank required a full harmonic damper (and the late block that was clearanced for the #8 counterweight).

[opelitis1]

Here are a couple more for your viewing pleasure of the 265 block dated Dec 20 1954.  There are punched numbers close to where the "Canada" punch is.
Engine was either a Junior Stock or Gasser from the 60s/70s.  Gonna dig up more info. 
Believe I still have the hub tucked away here and if so, I'll clear the hub/balancer mystery maybe up a bit.  I always thought cranks were forged in the early 265/283 days and not cast..
Will measure up the thread starter balancers in the next two weeks and show numbers punched on the outer hub and try'n de-cipher the GM numbers on the rear inner hub.  Could be interesting!
Ted

[JohnZ]

I always thought cranks were forged in the early 265/283 days and not cast..

All 265 cranks were forged, and so were all 283's until late 1964, when Flint V-8 began producing some 283's with cast nodular iron cranks.

[opelitis1]

Good morning John!!  Any idea what the 3867 code is for?? 
Thanks!
Ted

[JohnZ]

<<Good morning John!!  Any idea what the 3867 code is for?? >>

Back in '55-'56, engines carried sequential serial numbers (unrelated to car serial numbers), normally stamped on the front pad, followed by the code for the plant, date, and suffix (photo of '56 pad below); that might be what the 3867 is, although it's covered by the front of the intake manifold. That's a strange one.

[opelitis1]

Will take a better shot of exactly where the 3867 code is, 'cause it is not in the usual spot for codings.  Sorry about the angle, my fault. I appreciate the help by the way.
Ted

[opelitis1]

Pictured below are the 265 balancer of the left and a 283 unit on the right.  Both are 6 inch in diameter and with years of paint on them, I measured widths of .625 for the 265 engine, and
.780 for the 283 engine.
Check the size of rivets on the 265 model. Can't see p/n 's on them though.  Might be interesting to weigh them..??
Ted

[opelitis1]

Here are the other (2) pics of the balancers..