Help with flexplate

Here is a PDF file showing the 4 different flex plates Chrysler used from 1962 to 2001 on both the 904 and the 727. You say the converter if from a "late model" transmission, do you know what year the transmission is? Any ID markings on the converter?
The " even / uneven" bolt holes refer to the crank shaft bolt holes. Both Kim and Fishy 68 posts are right. 30+ years in the converter industry and like Fishy68 I never saw a symmetrical bolt pattern on a stock 727 converter. Even our high stalls, unless it was some special order, used the Factory bolt pattern.