318 timing chain.....and why the engine should come out.

256 from lunati, howards mopar grainds , bullet or best Mike Jone is way bigger than stock
Example Jones 256 is bigger than the MP 260 (which is measured at more like .006- at higher lifts but shorter seat to seat
dont buy a cam on how it sounds or you will end up with whiplash
buy on the torque curve
But not 268 low end sacrifice.... you got it