Well, I'd write down all the information at hand on the engine, transmission, truck itself and give a call to the tech department of my favorite cam company and see what they suggest.... Just be sure to talk to a tech and not some phone bank clown at a mail order catalog!

Though I get ridiculed every time I suggest it, I use Comp Cams free download called Cam Quest. If you put in good, honest, and complete information you will get a a good suggestion. With this information I then follow it up with a call to Comp Cams Tech Department to verify the cam I select is going to do what I want!