I have a pair of 1987 OMC V4 1.6L bubbleback SeaDrives. I was thinking it might be a good project to have a spare sitting in the garage if I could find a core that its owner did not want to mess with that I could rebuild.<br /><br />Any ideas on where to find a rebuildable core (like a marine junkyard)? Also if I find one how would I find out if it were rebuildable before laying out the cash?