I am using a 4 cylinder cummins engine which was built prior to 1990. (It is in a Model T truck that I am building to haul a hot rod.) It has injectors marked Bosch 937 KDAL 59 P 5 and has markings on it that say 245 BAR and 2468. It has not been run in years. I am having trouble starting it and think the problem is the injectors. Any tips on where I can get new or rebuilt injectors?