I took the heads off my GS350. While I was cleaning them I noticed that the cast numbers for the left and right is the same 1233472. I've been doing some research and I've come across the production figures and engine specs. and the 350 has two cast number it reads as follows Head Cast 1233472,1240143 I belive that this right and left. Am I correct or do I have two of the same heads and if they are the same will it matter when I go to reinstall them.Please help me in this matter Thanks Jim
