5.7 Hemi or Built 340?

if not stick with the 340.
agreed- especially if it's already rebuilt and just needs to be installed.

a high-12 second with 4.10's is about the setup my Duster used to have in the '90s, and I didn't mind highway cruising my car (hell, I'd even run at about 85-90 mph for long stretches-there's some revs lol).