[TomO]

The no1 and no5 cylinders share a rod bearing, if you still have the original 29A rods with the floating bearings. The engine should be pulled in order to fit the new bearing to the rod and the journal.

I am pretty sure that you have the floating bearings, because you had to remove the wires on the two cylinders to quiet the knock.

I would not continue to run the engine, you may throw a rod and destroy the block.