bought 318 magnum-cam choices?

It sounds like it might work good. Thats a roller camshaft in there, I would first look at Crane and Comp, and see whats avaible for it. Not sure but I do know soild cams act like they are 10 dergess smaller at low speeds and still act bigger on the high rpm's, for some reason I think rollers might be the same way. If so I would get a min. of 224 degress @ .050. but you need to find out what you can get or maybe they can custom make one for your motor. Let us know how it works out.