Casting number - The 1947 - Present Chevrolet & GMC Truck Message Board Network

71GMCer · 07-01-2010, 08:35 PM

Hey all,

Took this number off the pad infront of the cylinder head (passenger side)

K10 23 TBC

Any idea what all it means?

Matt

missinfishin10 · 07-01-2010, 08:44 PM

Check out this webpage

http://www.nastyz28.com/chevy-engine-code-stampings.php

TBC 1970 350 conv fwd cabs, a/t 255HP 4BBL C-10 to 3500

TBC 1970 350 m/t, 3 spd 255HP 4BBL K-10 & 20

TBC 1979 350 conv. cab, m/t,fed L LS9 165HP 4BBL C-10 to 2500

Jeff

71GMCer · 07-01-2010, 08:54 PM

It says the suffix code is TBC but that is the 3 spd and i have a 4 spd m/t in mine

07-01-2010, 08:35 PM	#1
71GMCer Registered User Join Date: Apr 2010 Location: Kelowna, Canada Posts: 116	Casting number Hey all, Took this number off the pad infront of the cylinder head (passenger side) K10 23 TBC Any idea what all it means? Matt __________________ 1970 GMC 1/2 Ton 4x4 350sbc SM465 NP205

07-01-2010, 08:44 PM	#2
missinfishin10 Amazed Member Join Date: May 2010 Location: Dahlonega Georgia Posts: 486	Re: Casting number Check out this webpage http://www.nastyz28.com/chevy-engine-code-stampings.php TBC 1970 350 conv fwd cabs, a/t 255HP 4BBL C-10 to 3500 TBC 1970 350 m/t, 3 spd 255HP 4BBL K-10 & 20 TBC 1979 350 conv. cab, m/t,fed L LS9 165HP 4BBL C-10 to 2500 Jeff

07-01-2010, 08:54 PM	#3
71GMCer Registered User Join Date: Apr 2010 Location: Kelowna, Canada Posts: 116	Re: Casting number It says the suffix code is TBC but that is the 3 spd and i have a 4 spd m/t in mine __________________ 1970 GMC 1/2 Ton 4x4 350sbc SM465 NP205



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