I agree with topside, they were done well before 6k, more like nose over just under 5500 and go figure ford replaced my 86 5.0 Capri motor twice for bearing related issues and 3 T5 transmissions as well. Fun cars but the stock parts pushed always seemed to catch up sooner then later. A cat delete, 3.70 rear gear and comp ta tires and things would start to break soon after.