I was on LX forum and they have a list of part numbers for a 392 crate right from Chrysler. The problem is there are about 6 different numbers just for the manual version and when I go to look them up, some same "ENGINE-COMPLETE" and some say "ENGINE-6.4L MAN TRANS GAS". Can anyone explain all these different part numbers are and which is really a "complete" engine? Prices vary for each. Which would be the best to get for a swap into a muscle car? Here is a page from a parts house that shows what I am talking about:

68111716AA
ENGINE 6.4L MAN TRANS GAS
53022071HA
ENGINE 6.4L AUTO TRANS GAS
53022071GB
ENGINE 6.4L AUTO TRANS GAS
53022071GA
ENGINE 6.4L AUTO TRANS GAS
5038691BA
ENGINE 6.4L AUTO TRANS GAS
5038691AA
ENGINE 6.4L AUTO TRANS GAS
5038292HA
ENGINE 6.4L MAN TRANS GAS
5038292GB
ENGINE 6.4L MAN TRANS GAS
5038292FA
ENGINE 6.4L MAN TRANS GAS
5037907GB
ENGINE 6.4L AUTO TRANS GAS
5037400HA
ENGINE 6.4L AUTO TRANS GAS
5037400GB
ENGINE 6.4L AUTO TRANS GAS
5037400FA
ENGINE 6.4L AUTO TRANS GAS

anyone??

any1 help??