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brj79ford
    
50's GMC semi tractor
I have a friend with a 50's GMC semi it has a big inline 6 cylinder gasoline engine with a large crack in the block. We also do not know the model it has a tandem rear axle with a fifth wheel hitch can anyone tell us the possible sizes of the engine and models?
posted: October 2, 2014
 
     
 
  Answers (2)
 
retiredpartsman
    
If the picture used is the GMC truck you are looking for info on it is a pre 47 model .google 46 GMC engines look for GM Heritage . or GMC HISTORY .The engines used in the larger 46 trucks were 426 and 477 cid . LOTS OF HISTORY ON THAT WEB SITE.
posted:  October 4, 2014
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brj79ford
    
The picture is not of the truck wehave came to a conclusion it is a 54 but are still not sure on the engine would they still be the same cid?
posted:  October 4, 2014
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