Eddie I have an unstamped SB and it's just over 20 .6 inches . On the outer edge of that inserts into reverse lever on trans and bell crank. Not installed but that's what I believe the application.
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Steve Shauger
The Supercar Registry
www.yenko.net
Vintage Certification™ , Providing Recognition to Unrestored Muscle Cars. Website:
www.vintagecertification.com
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