Hello all- Looking at a '71 SS/RS, with the 396. VN car with build sheet. Have found the VIN stamp on the block by oil filter. My question is what I view as a pretty questionable discrepancy between the block casting date of Jan 28, 1970 (A2870) and the assembly stamping of 08/18. Car was built 3rd week of September, 70. Just a hair over 6 months from block casting to engine assembly. That seems like a long time for a casting to just be sitting around... I know there weren't many LS3's built, anyone have educated thoughts on this spread in time? I'm comfortable with the condition of the upper stamp pad, it looks good. I'm not quite as well versed with the lower VIN stampings. Thanks in advance!