Oil Cooler Bypass Valve

[Lynn Eades]

I've just done another valve for a friend. Some things to note:
The ball is a 9/16" dia. (just in case you need to buy a new one?)
The book says to set the valve with it sitting in water.
If you hook it up the wrong way around, it will never bypass. (flow coming from the wrong direction holds the ball against its seat)

There are two different mounting brackets for the valve (this goes in conjunction with two different pairs of short pipes (B.P. valve to engine block)
Can anyone identify which carriers had the odd ones? (why the change?- Air cleaner?, Oil filter?)