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How to identify year of 8 3/4 and housing

Hemi 354

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Hi everyone,

Needing some expert advice from regarding how to identify the YEAR (if that makes a difference) in my 8 ¾ housing and Sure Grip punkin’. I have a 489 SG in my 66 Belvedere and would like to know exactly what year it came from. Any numbers I can search,…any identifying marks or stamping that you know of….and WHERE do I find them?

My car is a combination of 1966 thru 1970 parts --along with many aftermarket items. Obviously, not a numbers matching car, but it functions great !

I currently have a 3.23 SG ratio and would like to increase the ratio up to 3.55 or higher.

Thanks
Rick
 
489 Carrier came in 69 I believe there should be a date on the ring gear. You can measure the length of housing and check on the charts to get an idea what years it might be. The components could be mixed from different years.
 
Never paid much attention to any numbers on the housing but the 89 case came out in 68......
 
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