The 98. 5-02 feul system is tricky but once the kinks are worked out serious hp can be made. PLAN on dealing with the feul system on these trucks. I for one like the 94-98. 5 12v, with the most desirable being the 98-98. 5. (they come with a third door), then the 97 (they come with the best injection pump, the 215hp p7100). The p7100 has the ability to deliver copious amounts of feul on demand all without the help of a computer! IMO they are less finicky about the feul you run through them also. All 94-99 trucks will have issues with the kdp (do a search). Make sure your next truck has the Dana 80 rear end. Transmissions are a touchy subject with warnings on both sides of the aisle. The nv4500 has a nasty habit of spitting the 5th gear nut into the bottom of the transmission. Fix it right the first time and problem solved. I despise auto's and know that if you want them to last under abuse, plan on slapping down some frogskins. With a standard, when I let the clutch out, the wheels turn or the engine stops. Period. I also like the 03-06 trucks but they are expensive to buy and even more expensive to hot rod. Thank the Lord for the fact that my truck is paid for and that has alot of bearing on my opinion. This should be a great thread if everyone chimes in. Good luck.