5.9L Magnum 360 Build in a Jeep

I recently detonated a piston in my 5.9L Grand Cherokee. Am looking to rebuild because the block was not scarred much. My dad is the mechanic but is having trouble finding the parts to rebuild. Is the 360 in the 98 Grand Cherokee the same one used in Dodge pick-ups, dakotas and Durangos? Where is the best place to find complete rebuild kits? Am looking to kick the HP up to between 325 and 350 but want to maintain a good low end torque for towing on steep inclines. Will only be towing about 5,000 lbs and currently have 3.73 gears. Before actually towing am thinking I will be going to 4.10 gears.
Author: xaza