The Iron Block (pre-srt) motors are very low RPM torque
monsters designed for towing. I'm currently trying to figure
out how to put on in a Satellite, but I'm not sure if there
is enough room.
The Alum V10 is physically shorter and lighter.
I think I read that the SRT blocks are basically the same
except the Ram has a bigger oil pan and different
bellhousing - I very well could be wrong about that though.