You'll need a 80E specific crossmember, or modify your stocker to fit. Yoke should be the same, you'll need to have driveshaft shortened though. Aftermarket controller will control the converter.My th400 just kicked the bucket so I am looking in upgrading to the 4l80. I have a couple questions. First is do you have to get a new cross member or is there enough wiggle room on the stock one. Second is will I need a new driveshaft yoke. Third is do most aftermarket controllers run the lockup converter by themselves.