1968 Scout 800 4 cly
I recently had a serious engine problem. My son was driving the Scout and the oil filter base cracked and drained the oil(it was cracked before I got it had been welded by a previous owner, unknown to me). There is smoke coming out of the head, apparently serious engine damage. I have not yet taken it apart to determine the exact problem. It is not siezed and still runs.
What resources are available to rebuild the upper engine? replace it ? etc.
What engines can be swapped for the original?
Can an IH 8cyl be put in it? I saw one on Ebay that was not too expensive.
Any advice appreciated.