[1989ZR1#74]

So #2299 has an LT5 with a deviation in the MM stamp/markings, and with the BG stamp/markings. Both correcting a previous mark/stamping. It was clearly done at two seperate points of manufature 100s of miles apart. It was delivered to customer on 11/22/1990. It has a block casting date of 03/07/90. It has a documented history of being off the road for a year early in it's life. Engines, at least in the early days of the ZR-1 were shipped back to MM for repair. The only point I can not foot note right now is my belief that the customer was given the option of repair their LT5 or replacing it with an available "core" from MM.

There is nothing in what I just typed that will ensure that that did happen, but there is also nothing as of yet to prove it did not happen.

Another thought/theory, "Mary" the inmfamous BG lot driver who in 1990 was cold starting ZR-1s at WOT and grenading the LT-5s must have taken out several LT5s. What process did Chevrolet go through to replace these engines? What did they do with the damaged blocks? when did Mary stop killing LT5s? Could #2299 have started it's life with a new block because Mary killed it? That would make #2299 an interesting footnote in the lexicon of ZR-1 history. Time to order your build sheet and invoice to find out when it was built and when it was shipped. If there was a large gap maybe it was waiting to get a new LT5.