That is just a simple frost plug in the speedo on the drivers side, you may have to punch a hole in it to pull it out and pry it with a large screwdriver. You just need to get a th400 speedo gear and holder assembly with mounting clip, and make sure you have the correct ratio. Any tranny shop can get this for you. You will have to order the correct speedo gear ratio, depending on your tire size and gear ratio in the diff. Yo will have to see if there is a gear on your output shaft already if not you wil have to pull the rear tail yoke and install one.