Hi All,
err on the side of caution.
In that case do NOT fit an ASV valve
More engines have failed because of them than most other reasons
When the oil leaks away from the pump side of the ASV the pump will not prime itself
My 2 cents worth is to modify the original ball and spring to the A65 setup where the ball sits against the back of the pump!!
Lots of posts on this before
A pump would have to be completely knackered not to lift the photo'd springs
Remember the oil pump pressure will compress the strong spring in the pressure relief valve
John