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Old 11-17-2015, 02:01 PM
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johnta1 johnta1 is offline
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If the trim tag (Fisher Body) reads ST 73 and TR 233 under it (you would drop the first number (2) and add a number (1) to the end of the trim code) to get 331 which would be the std. Saddle in '73 for Firebird
Here's a couple pics showing how to do it.

1972 (1973 basically the same)


1974:




When I saw the '9' for Custom seat thought I might be on the right track.
Not sure it applies in this case but I found the codes.

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