Easy way to test oil pump...turn over the motor. if you the rocker arms get sprayed with oil your pump is not dead. I am presently using a honda performance battery in my 240. It free'd up some room and was less bulky.

- Ps, remove oil cap on valve cover...have friend turn over the motor. if you get hit with oil your pump is fine. However, due to the nature of KA and SR's if the Oil pump has gone you might want to consider a crate motor or swap rather quickly.

Edited for typo( orginal wrote if the KA & SR battery. That's wrong. It should be oil pump. I was tired and didn't proof read).