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shutto1972 · 03-21-2016, 01:51 PM

Let me add something else to the mix please. I have a 69 c10 step side. the casting code on the block is 3981968 then GM and the number 50 under that. Trying to see if it's the 250CI as well. All original one owner truck (my father in law) so i know its the original engine.

03-21-2016, 01:51 PM	#22
shutto1972 Registered User Join Date: Mar 2016 Location: Macon, Georgia Posts: 2	Re: Chevy Six Cylinder Casting Numbers Let me add something else to the mix please. I have a 69 c10 step side. the casting code on the block is 3981968 then GM and the number 50 under that. Trying to see if it's the 250CI as well. All original one owner truck (my father in law) so i know its the original engine.