Hi all. I have a set of heads that were supposed to come out of a ' 76 vette. I have some numbers and I am not sure what they all mean. Can anyone help me out here. On both heads there is a 333882 number. There are more numbers but they are not the same on both heads. One head has a GM 21 and C4 6. While the other head has a GM 31 and L 235. If anyone could help me out I would appreciate it. Thanks.
duckenit