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I dont have an explaination for every part number casting date anomoly..
no industry that is run by humans will be perfect SOP is 4 digit code is cast date and the large number near it is intended model year it went into or cast for service replacement parts WILL / CAN have a cast date later than model year IE. i have a set of 1970 RAIV 614's that were cast in 1973 RAIV's dropped alot of valves in the warranty period |
The cast Year doesn't mean it's for the model year. In 1969 when they cast the '70' it was put in quite a few 1969 Firebirds because of the extended run of Firebirds.
Not sure what they mean, but I figured it might be for a change in the block. 1970 went to 5 bolt mounts for example, and 1975 late went to the 500557 blocks. But I do know that the partial VIN would be for the model year. 79 Phoenix block was a 1976 model. :) |
Quad, is the block you posted have a 1976 partial VIN?
:confused: |
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Reading through this site there appears to be exceptions to so many general rules. |
This is all very interesting and helps me understand what I've got. People being fallible and blurring of calendar dates with change of model year dates may also enter into some of these seeming discrepancies in the casting #s. But I am going to assume I've got a 76 block and crank.
Thanks everybody for your input and help with this! |
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