I have my dad's 98 Grand Cherokee Limited 5.9 and it's a rocket...
They only made them for one year, he special ordered his... Only 47,000 miles on it today...
I use it to pull non-running cars around the back yard... With 365 foot pounds of torque and full time 4 wheel drive it pulls cars effortlessly... Amazing how much torque it has even at only 1200 RPM...
The drawback is, it takes premium and guzzles gas...