Replacing my speedometer cable

65 Dartman said
Gears are interchangeable depending on rear end ratio and tire size. I've probably got 5 or 6 different gears of different color persuasions.

I’ve got some speedo issues on my ‘64 that I’m hoping a new speedometer cable can fix.

Not the least of which is that my tires are larger now than stock. If I understand correctly, they are able to account for that when you send it in?