Todd, DO NOT use either bellhousing that you have on this '51 truck plz! You need to get a '48 to '53 Chevy TRUCK bellhousing because the '54 and later rear motor mounts are DIFFERENT than '53 and before! You need the earlier bellhousing because of the '51 chassis,ok bro? Plus, I suggest you use the 6 volt flywheel, starter,and clutch assembly from the truck! If you dont have it, call Tom Myers at 918-542-3871. tell him what you need and he'll help!there are other options available for your truck to keep your original driveline as well as upgrade that terrible stock transmission! Good Luck, Phillip