Pypes did the exhaust on my 67 also. They have pics of my car up on their installation gallery site. http://www.pypesexhaust.com/gallery92.html Everything I read simply said to clear the exhaust as quickly as possible. Letting each side flow to Two 2 1/2 pipes is a good way to do that. That along with the RacePro Cross Muffler makes for a nice sound.