Of course Cobalt really wins this one but thanks for the info BB.
It really is a neat little motor, here's one in a motorcycle.
It's really hard to see the difference unless you see it next to the 80 it is quite a bit smaller and a cute little motor. Most speed equipment companies made stuff for them so you can get finned Edelbrock heads for it with multi carb intake.
Yes the tube axle was used on these V860 powered cars, why, I have no idea! I guess it was a little lighter? I have never weighed one next to the I beam but my brother installed one on his chopped and channeled Model A pickup back in the early eighties. The whole front end was chromed and rusted, he bought it at a swap meet for next to nothing as I remember. But yeah, interesting that Ford used them on the V8 60 cars only.
It's your floor Cobalt.