Crank - we offer a 522 CID engine package for the Ram SRT10. We have build 3 of these for the Viper SRT10. We have been making 590 rw hp and 590 rw torque thru cats. Its an expensive engine package but its a lot of fun to drive (in the Viper). I imagine it would transform the truck as well.
http://www.hennesseyperformance.com...Qpexrz&DoThis=Dodge+Ram+SRT10&ActionReq=Where
http://www.hennesseyperformance.com...Qpexrz&DoThis=Dodge+Ram+SRT10&ActionReq=Where