Hy 48GinPole, I don't know that anyone makes a "kit" for that transmission, that is a crash box transmission (no synchronizers), I think all you could do is change the ball and needle bearings if they need replacing and check the shafts and gears for wear and damage. If that is the transmission you have, your truck is more than likely a 1947 model, as that was the last year for the sliding gear transmission, hope that helps.
