Quote: I know that nothing is "perfect", thats why there are tolerances. But as a point of reference, how do "stock" mopar cranks measure out in regards to journal taper, concentricy, and indexing? A lot of folks take factory stuff and reuse it with out checking anything and don't give it a second thought. Just an honest question that maybe some of you machinist that have checked a lot of them can answer. I too am looking very seriously at a 440 source kit. Thanks, Brian
Brian,having done a great deal of "stock factory" rebuilds over the last 40+ years we found that the machining was very good and specs held to good acceptable tolarences.Some of the later engines after 1971 showed more issues as the tooling was becomming worn by production use and many times it was cheaper to accept the issues or discontinue that particular part.440 blocks from 1971 and up show a lot of different issues as did the 383s.Usually you can correct those issue since you can spot the wear patterns during the disassemble,similar to what we do on a tear down and freshen up on a race engine.It was not uncommon in the early years to find one or other undersize bearing,oversize bores,oversize lifters and so on in factory production engines.The assemblers were more on their toes back then.
