I have a 327 block but I cannot figure out the stamped numbers on it because it's V0327HH and then the other stamp number is 781134994 but none of this makes sense to me because the casting number is 3914678 which makes it a 1968 but I can't find any information on a 1968 HH it is a high perf stamped block but that's all I know there's literally nothing on the 1968 it it just skips that year I've looked in the lime book and I've looked on all of the forums but still nothing they have all these letters to decode as well and there's no letters it's all numbers so if somebody can help me out that would be wonderful. Thank you ( I am referring to the stamped numbers NOT the casting number that I am unable to find information on)