16 inch
The heads are aluminum, the block is iron.
Yes
No, not from the factory.
No
The transmissions are the same. The torque converters are different.
16"
835
16"
A 2014 Dodge Ram 1500 stock height is 6' 2.6" (74.6").
5w30
There is no engine difference. The main difference is in suspension, and trim.
I recommend leaving them stock.