I had a set ov Hooker Super Comps on the 340 in my 71 Challenger for a while. They do fit pretty good, but you need a hell ov a motor to use them. The tubes are too big for a stock type motor. They are 3/4 inch from exhaust port to collector. Kills the bottom end if you have a pretty much stock motor. Check the small block for sale section, or maybe A-body parts. I think there's a set ov brand new Dougs 453's on there with one dinged tube. If they fit an A-body, they will fit an E-body.