Oh I know there are critical differences. I was really just pointing out plenty of performance potential. I worked as a mechanic at a Chrysler Jeep Fiat Maserati dealer. Have spent lots of time getting to know the 3.6.
The 3.6 makes around 290 hp in a wrangler. Over 300 in a Charger Challenger. I would expect the valiant to drive like a 340 car and be able to get over 30 mpg.