I have one of those 5.9's. The 5.9 Magnum (360) was only available in 1998 in the Grand Cherokee. The only year. It's a factory roller cam motor, so it's not worth a premium, but If someone was restoring a '98 Grand Cherokee, they might pay extra for it, but I doubt it. I had mine sonic checked for a .030 overbore, and the block is plenty thick. My stock heads appear to be not cracked between the valve seats, but replacement heads are going to be cheaper than having used, cracked heads sent from the USA. JMO.
