Yesterday I pulled both fenders and what was left of my core support off my 72 sbb skylark and had a real good look at the motor for the first time. I noticed that on both heads there is the number 73 casted on the far left of the head were the exhaust manafold bolts on. Does this indicated that it has 1973 heads? I have searched this forum for answers and have found out were to get the casting numbers and will look at those this afternoon. Thanks in advance. Richard
