The stock 340 cam is 268/276 .430/.444 It has 18° more intake duration and 16° more exhaust than the XE250H that Moparmandan used. The lift is about the same. I wish I had the @.050 specs on the 340 cam. May'be someone will chime in with them. The smaller the engine the less they can tolerate duration and still be mild enough on the street without a converter and/or gears. With a stock Teen and say a 4 barrel and dual exhaust I wouldn't go bigger than the XE262H. Do you happen to have the stock specs for the 318 and 360 cams? I don't right off hand. They were pretty anemic if I remember correctly but a 360 cam in a mild 318 is a good step up from what a few said that tried it. Any cam that's bigger than stock specs is a improvement as long as you don't go too far.
