ChevC90, call Leids Diesel Service in PA, 717-776-7725 and talk to Timothy. They are the Detroit Diesel gurus and if they can't help you know one can. Grigg might be along to shed some more light on your problem too, he has dealt with this shop for years. They are the best. They have helped him out with his Detroit Diesel projects and have also worked on mine and John Millimans 6-71s.
Good Luck.
