as far as the block goes i dont think youll have to worry too much. i dont know if you have seen a bare v10 block but theyre built like a freight train engine. the casting is very heavy built and alot of engineering went into them to make them as rigid as possible. (rumor has it Lamborghini helped design the engine years ago) i havnt actually seen a set of head so im not sure what potential they have. if you manage to build the thing up keep me posted cause im wanting to turn mine into a mud bogger and was planning a major rebuild hoping for 600 hp or so, already have a bare block fully machined. a web site you might find useful for some info is http://dodgeram.org/ram.html
its pretty much all factory specs but might be useful.