One of my racing friends is considering buying a 99 Dodge 2500 V10 truck he's a Brand X racer but called me for advice on the truck. He said the truck is clean but has a slight valve type tap.It has 77,000 miles. Does anybody know much about or have one of these trucks? I don`t know much about them. What could the tap be, is the V10 a good engine , hard to work on etc.? Thanks