engine oil or transmission tube? which one? I am assuming engine, but please clarifyAnother point of interest for anyone looking to do this, Be sure you have a Mustang dip tube handy. I had one from when I did my motor build last year, it comes in the head bolt/head gasket swap kit. I tried to get the T-Bird one to fit, didnt seem to want to go in, but the Mustang one dropped right in. Now this could be due to the fact the engine is still bolted to the K-member and the motor mounts, but I'm thinking it has more to do with tube placement. Either way, perhpas if you assemble it with the dip tube then the mounts then the headers it might work I dont know. All I know is I couldn't get mine to work, but the mustang one dropped right into place. Something to keep in mind.