Buick 215

he block shown is a Rover block.
How can you tell this is a rover block?

This block does not have all holes that line up with the 300 heads (or at least i think they are 300 heads).

Or.... these heads do not have all the holes that line up with block.

I'll get a couple pics to show difference.

AND.....are all 300 cranks created equal?

I really should find the correct forum, but i figured one or two of you could give me enough info to make me dangerous.

Thanks!!