If your mom doesnt think your truck will last much longer, then have her buy you a newer one. These trucks will run on 300,000+ miles if all maintenance is done accordingly. My dads landscape/maintenance company has mostly F250 diesels, but still has 3 F150s running. 2 97s and a 98. 2 of them are the 4.6 and one is the 4.2. They all have over 320,000 miles and only have needed brakes, and some paint is flaking off. The trucks are driven HARD by the laborers. They never come to a complete spot when switching from reverse to drive, so you would think that the trannys would be toasted, but with the oil changed every 3k and all fluids changed accordingly, theres no reason why yours shouldnt make it that far.