actually it should be a 3.9 and it is a 318 with 2 cylinders missing one of the best engines mopar ever made, Ask Strokerscamp what he thinks of that motor, has the same pistons, bore and stroke as the 318, just 2 less cylinders, my son has a 1998 and it came with holley fuel injection OEM works great he gets approx. 20 mpg on the highway with it. it has over 160,000, there is a guy on here that has 300,000 on one of his dakota's with the 3.9 IMO stick with MOPAR...