Re: Motor Serial Numbers
your engine serial number indicates first that it is a 432. the balance of the number indicates that this is the 796th engine built in this displacement. According to the paper titled "the first century of GMC trucks" P.33 stated that all gmc V-6 engine production ended with the end of the 1973 model year run. I know that this is incorrect because i personally know of at least 3 c-series trucks built in the 1974 model year production with GMC V6 power. two were 379's and one was a 305c. I believe your engine is a 1973 year production.
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