2-speed rear end mod?
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well, they did. 6.33 I think. The tallest ratio though was 5.83.
Unless you switch to a completely different later model axle you're stuck with the 5.83 axle.
You could switch to a later model engine 300 I6 or 302/351 that would match up to a ZF-S-542/547. You would then have a 5 speed with a 0.8 OD. If you did that you would also have to get a tailshaft mounted parking brake. They're available but they're not cheap.
Unless you switch to a completely different later model axle you're stuck with the 5.83 axle.
You could switch to a later model engine 300 I6 or 302/351 that would match up to a ZF-S-542/547. You would then have a 5 speed with a 0.8 OD. If you did that you would also have to get a tailshaft mounted parking brake. They're available but they're not cheap.
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