Well, I have no idea what these things were rated for at the factory, but my 401 cherokee (stock) kills my bored and 4 barrel 360 wagoneer, so if you ask me use a 401 if you have one! My dad had a built 360 in a cherokee that was bad ass when I was a kid. It was fun when I first got my licence. Of course I wrecked it! Dang kids!
78 Cherokee WT with a 4" BJ's system 401/TH400/half of a QT and 35/13.50-15 Toyo MTs