n2deep Posted August 27, 2009 Share Posted August 27, 2009 Looking at my collection of engine blocks and decided to build another one. I have to Mack 350's to use. Question is why are the blocks blue, not really important but I was just curious. Thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/10468-engine-id/ Share on other sites More sharing options...
Rob Posted August 28, 2009 Share Posted August 28, 2009 Econodyne series.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/10468-engine-id/#findComment-39675 Share on other sites More sharing options...
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