Quote:
Originally Posted by 1989ZR1#74
Ok let me summarize my questions that will help decipher this mystery:
For now I am focusing on the Mercury Marine oil pan stamping and casting info. Any of these questions will move the ball forward:
What is a typical casting date for a May 1990 ZR-1 LT5?
What is a typical date separation on the upper and lower castings on any 1990 LT5?
What is a typical oil pan MM stamp number for a May 1990 casting date LT5?
What is a typical oil pan MM stamp number for a March 1990 Casting date LT5?
What is a typical oil pan MM stamp number for a #2000 to #2400 1990 ZR-1?
Anyone with this information on any 1990 ZR-1 may help so don't be shy post.
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Apparently, the "ball" fell into a deep hole and got stuck...
Anymore thoughts on this, or is it going to stay a mystery forever?
