Im pretty sure the 430 never came with a 12 horse power briggs engine. Is it a re-power?
Congratulations! 430s are good solid tractors. You'll enjoy the steering brakes. They shorten your turning radius, but also act as limited slip when you spin a wheel. Just apply enough brake to the spinning wheel to stop it from spinning, the other wheel receives power, and you're on your way.Pending till Sunday then it is minethanks Mark