Did you have the main bearings and rod bearing shells out of the block and the rods? The number 1 main feeds only the number 1 rod and the number four main feeds only the number 6 rod. Rods two and three are feed from the number two main and rods four and five are fed from the number three main. Which rod bearing did you lose, you talk about number six rod and number four main and they have nothing in common. You mention that 2,3,4and 5 are ok, what about number 1. Depending who supplied the main bearing shells some have a hole in both shells and some have only one shell with a hole in it. I installed my number 1 main with the hole in the cap and the shell without a hole in the block saddle even after telling my self not to do it. Got about 40 miles on the lubrplate before the knock started. Had 50 PSI oil pressure but none to the number 1 rod.
