A sample from the products for the Cylinder Block include: Bolt,flange,6x16, Bolt,flange, 6x32, O Ring, 8 Dia, Bolt Stud, 10x90.
Check out any of the twenty-seven Cylinder Block components enlisted.
The most reasonably priced component used on the Cx500 1978 Canada Cylinder Block is the Screw,tapping 4x8.