Street & Performance has the 5.7 Hemi. They also have a couple of build projects with the 5.7. Check out their web at
http://www.hotrodlane.cc/indexhome.html.
The other option to buy the Hemi is from your local junkyard. It seems that a lot of RAM 1500's are being wrecked...I wonder why?
Also, the rumor is that Dodge will compete the engine next year in NASCAR. Lot's of stuff becoming available.
With a paddle shifting 5-speed auto Tremec, ported heads, Weiand intake and a 750 cfm double pumper, the virtual dyno says 650 Hp. I think that sub 4:1 weight to Hp, the paddle auto combination is a must.
I am looking at a high rpm build at >7000. All of the 5.7 specs point to that number as very doable.
All said, I am still not sure, but if one comes along from the local junkyard search or e-Bay, I maybe tempted. A little too rich for my pocketbook as a crate.
B