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  1. Evening all. I am looking for some guidance on a little conundrum I currently have. I recently purchased a replacement cylinder head for my '49 ODS6. The engine was completely replaced at one point as it has no engine serial number and 1952 casting dates. I thought I did all of my research through several forums and parts books confirming that cylinder head part number 260869 could be used in place of part number 8228. The problem I have is the injector hole in my new head is smaller. I have the "big nut" injectors used on engine serial numbers 501 thru 14500. The 260869 cylinder head overlaps into this range starting at engine serial number 7201 and up. The injector hole in the 260869 head is around .313" and the 8228 head is around .450". I also have an early pre "A" style injection pump. I am assuming the 260869 head and my "big-nut" injectors/pre-cups will not function together unless the injector hole is machined larger in the head. I have another set of injectors, used on sn 14501 and up, but no pre-cups for them. Am I correct in assuming they need to be paired with an "A" pump as they operate at a higher pressure, hence the smaller pre-cup and head hole? Any guidance would be appreciated. Even if my current combination of parts wont work, I have a fully reworked head that may be for sale or trade.
  2. Hey guys wondering if anyone out there has a breakdown schematic of the B style pumps for a 450 diesel, showing parts and mainly seals. Thanks!
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