tin can swap meet rods? Shrinkage? What do you think a place like Brodix or the like uses. Extreme extensive welding in the deck area is done every day. What is the issue here? Is it that you think that the deck surface is giving way under pressure? Does it show on a straight edge? There is the weak spot fill and mill. Cylinder pressures under combustion is the issue . Mechanical ratio isn't the issue. A pinging 8.5 to one engine has more pressure than what you are dealing with. Is there warpage showing on the head?
