If you're looking for injectors, any other Detroit parts, or just good advice on them try Leid Diesel Service in PA. That's where I go for my Detroit parts and advice too, they really know their stuff. They ship quickly too, you don't have to go visit although it is worth the trip. Here's their card, ask for Timothy (the other guys are great too) can't hurt if you mention that Grigg suggested you call.
https://picasaweb.google.com/118082...onProgressPictures02#5806309969118721986

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-