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Old 03-03-2010   #48
1989ZR1#74
 
Join Date: Jan 2009
Location: Scottsdale, AZ
Posts: 700
Default Re: Noticed something interesting on my LT5...

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.


Last edited by 1989ZR1#74; 03-03-2010 at 08:32 PM.
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