Detroit 60 12.7 swap

Need to swap out 60 series 12.7. Does anyone know if DD15 motor mounts will align to my FLD120 frame? and will it fit under the hoood?
Also, I hear everyone talk about crate motors, where can one shop for one? Are they complete, or are they literally just the block? In Ca, so no choice in the matter.

 

I did find a wrecked one, but cant tell if the motor mounts will align on the frame, was looking to see if anyone might know the answer to that? And if all the components fit under under the FLD hood? I found a company in Oregon , who makes the wiring harnesses.

 

It's an FLD120, yes I'm in Ca, and only have 100K miles on my rebuilt 60. In ca you can't have anything older than a 2010 engine(regardless of engines condition).Getting rid of a rebuilt 12.7 is not by choice, so financially it makes more sense to swap out the engine, then purchasing a an over priced truck. But need more info to proceed, will motor mounts match, axle lines align etc...

 

The retrofit is only good until the year 2021, at which point the retrofit will be useless and everything on the road has to be 2010 engine or newer. The retrofit cost as much as the wrecked truck 17K. I'd rather spend 17 now to be good for ever, and not a band aid.