See photos of the tight tubes. Did you already install the 727? If so, you must of modified the tunnel for it to fit, right? My '63 runs a 727 and it took some work to get it in. I can see why you would want to stick with it if it's already installed. The right front corner of the 727 pan/case sticks out further than a 904 and interferes with the right side collector on the TTI and Doug's. I made mine from an old pair of Headman Huslers that came off a '73 A. They were intended for one pipe on either side to go through the I.F. I did not want to cut up the car so I cut up the headers. Dip stick, kick-down and oil filter are also stumbling blocks. Just food for thought. Good luck with your decision,
