It wouldn't be a bad idea to install the offset bushings that's for sure.
As far as how, if all you were trying to do was make up for lost length you would install both bushings so that the offset was toward the frame (fat part of the bushing facing the ball joint, skinny part to the frame).
I'm not sure I'd be inclined to install them that way though, I'd probably still install them for max caster because I think that's a bigger issue. How tall are the spacers? And, I guess if this is a Hemi car staying close to original specs are you running radials up front? Or bias plys?
