You're looking at it stock vs 5.7 hemi. I'm looking it with other current alternatives.
If the truck was built 15 years ago, than a 5.7L / 545re was up to date... they didn't age well. If it's a 15 y/o build and only 2500 miles, it sucks to drive.
By today's standards, I'd want to see a 6.2/4L hemi, a double over autotragic worth a shit, or period correct with a fo-foty.
Don't kid yourself. That's a 10-12mpg truck with a slant, 318, or hemi.
Overspray screams liquid overhaul and 'muh hemi' with zero other insight given.