Which cars used these and which gear ratio?
TIA
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Try to offer a little help.. I have one and was told it was for a later drag pack car- 4.11 - 4.30 gear sets and for the 68-69 years. Others may have more input.
I think your talking about the normal Boss style dragpack gear reducer. This is a very early one used by Shelby in a very few early cars and I am looking to be educated by the experts on something I do not know much about
Thats probably it. Best of luck on the early one.