318 Senior Project Build

Just remember, large cams, large ports and big valves do not option high stall converter, they REQUIRE it. And stiffer gears too. The 268 cam with around a 600-750 cfm carb (with proper jetting), and magnum heads will produce a massive horsepower gain over the stock 318 4bbl. I think it will push well over 300 horse, but tuning with the ignition timing and carb jets will be just as important to getting the most of the engine.