Would I just be better off to buy a crate Hemi
In a realistic senario?....Yes, while the stage 5 coversion heads were"great" back in their initial release, because Hemi blocks,heads,...generaly Hemi anything was scarce, and expensive.....these heads filled a niche,.......unless you really want something different, there's alot of work ahead of you, and $$$$$ to mount these heads on an RB or B motor.......plus down the road, if you need parts, they might not be available, readily?
you can save the 
up, and buy into a 426 crate for about $10K........or buy the peices as you can afford them from MP, or other Hemi suppliers, and build your own.........
