Crank bolt

I know this is a stupid question but I'm going for it. I do need a crank bolt, correct? The reason I ask is I have a new Mopar crate 5.9 and there isn't a crank bolt. I wasn't sure if this was a magnum thing or it was removed by the previous owner. If in fact it does need a crank bolt, and I'm sure it does, do I use any small block bolt or is there one specifically for the Magnum