None of them are bolt on, they're all of the press on type so basically to do a rod change you would need a press to get the pin off one of the flywheels, then to reassemble you'll need to make some type of jig to keep the crank perfectly aligned... The easiest way to do it would be to find a vendor who sells the crank/rod combo you need.
You could call Duane from thatsdax.com and see if he has the assembly you need at 303-459-2780. He has crank assemblies on his site but these you need to call about so you can get the right one.