I may be missing something here, but I don't see the significance of different casting dates for the upper & lower crankcases. They weren't "mated" parts until the machine work was done.
Until the last post the only date I saw was 3/07/90. Now that we have a 5/08/90 it makes the gap from LT5 to ZR-1 install much shorte and typical. I am just curious why the upper took so long to get mated? any idea why?
02-28-2010
Re: Noticed something interesting on my LT5...
Threaded Mode