Larry,
Yours must have had a different casting number?
I don't know, I am certainly no expert but your Canada/Mexico (Chile in this case) theory sounds plausible to me.
The other thing that is interesting that you probably understand better than me, is how the 292 head relates to the 194 block? And/or how the 194 head relates to the 292 block. In this forum there's a guy that seemed to have that combination.
If I ask too many questions, ignore me.
