440 cam selection

Yes, you should be looking for a different cam. Although there are several shelf grinds that look really good for this, I'd probably go with a custom order cam in this case.
Edit: I at first thought it is 283 @.050 stick but Hot Metal is correct, 275 @ .050, 4000-7000 RPM. I'm pretty sure it would work better with 4.88 to 5.13 gears, though.