70 dart manifolds

check the TTI website. It is very detailed and inc manifold numbers. My 2.5" TTI system bolts to the manifolds, but i have a different type 340 passenger side manifold. It exits at an angle not straight down and the TTI system was designed for it.
Also, you wont believe how tight it all will be on the drivers iside and how you need a buddy to help you get the bolts done up on the down pipe to manifold connection . It a ***** and i have to reconnect mine in about a half hours time!