Guys I got lucky again . Finished putting in a overhauled VH4D . Started up and adjusted the timing ran for 10 min. Shut down and started putting away some tools . turned around and the smoke was poring out of the harness . Was able to pull the positive cable . My point is out of 5 or 6 610s through my shop this is the only one with a factory harness . I know one of the other one had a fire . If any of you guys with a 610 have a factory harness with a plug in to remove the engine just BEWARE .