Lose some body fat, don't tell me that ram is light, I have the extended cab model. the Magnum V8's are also famous with machine shops for cracking heads. Suffered that last fall when I bought the dang thing, one cracked and one warped, both were sucking engine oil into the intake and coating the valves with junk. Its much more snappy now... 318 and 360 heads are the same thing along with the cams. there are computer cams out for the dodge 360 but you still have to get the computer programed.
Honestly after my experience with this Magnum engine I'm not sure I will ever buy another, but then I dropped $600 into my engine 2 months after I bought the truck, and still counting, need a new breather and radiator yet.
makes me wonder If I will ever get to buying that liftkit.