I have three rebuildable/servicable SM420's and a few SM465's that are servicable units as well. one of the 465's is out of a cab over or cab...
I'm not positive and cant find the book I was looking for to confirm it, but I think that L=december, 18=day and the 4=would make it decade plus...
GMC V6's, V12's and the rarer V8 are getting to be far and few, but there where a lot of them made and sold in there short run. A lot of people...
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