Silver sport tranmissions

Dennis has a 69 Coronet, an original 440 4 speed so it has the Dana 60 with 3.54 gears. I have the 8 3/4" with 3.55s. The trans he has is the one with the .64 5th gear.
Ok ,just wonder what my rpms will be at highway speed. Running 410 gears with .64 overdrive. Went with 410 because plan on racing the car a bit. Couple pics included.

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