I found a local salvage yard that has a bunch of new (rebuilt) Detroit injectors sitting in the boxes on a shelf in his back room on shelves covered in dust!! Some of the #s are c60, c65, E65, e45, S70 and so on....these can probably be bought for $20-25 each. What is the meaning to the #s and letters and how can I tell if they will work in my 53 series engines? Where would I find out this info? Thanks, Chic