3.73 gear questions

[StormTrooper]

does anyone know the correct color speedo gear to use for 3.73 gears with a tremec tko 1995 cobra
also is a fms aluminum driveshaft worth the money?

 

[Smeckel]

According to the Steeda website, you'll need the red one (21 tooth gear). Prolly won't gain alot with the aluminum driveshaft, but it'll smooth things out abit on the highway.