Oil pressure sender is at back of the block, about in the middle, trying to remember how cams get their oil.From what I can make out from the manual, parts book, and pictures on the internet there looks to be a single gallery sending oil to the head. From the look of it the gallery sits at the rear on the left hand side of the engine and my crack is on the rear at the right so hopefully the crack doesn't go to a gallery. Hopefully someone who has had an engine apart can chime in with a definite answer on this one.