69 GMC straight 6...how to tell what size it is? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70blackfish · 10-09-2012, 03:38 PM

It's a 6. And it has hei distributor ? What ci?
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**john** · 10-09-2012, 04:31 PM

This should help.

Shaky · 10-09-2012, 05:57 PM

The above combined with the below might help:

http://www.inliners.org/casting/numbers.html

da-burb · 10-09-2012, 07:57 PM

take note of the fuel pumps in the pictures above, behind the motor mount is 292 only. In front of the motor mount is 250 and smaller.

70blackfish · 10-09-2012, 11:32 PM

I think its a 250ci.......

thanks

10-09-2012, 03:38 PM	#1
70blackfish Registered User Join Date: Oct 2012 Location: Newhall CA Posts: 1,195	69 GMC straight 6...how to tell what size it is? It's a 6. And it has hei distributor ? What ci? Posted via Mobile Device

10-09-2012, 04:31 PM	#2
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: 69 GMC straight 6...how to tell what size it is? This should help. Attached Images __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/

10-09-2012, 05:57 PM	#3
Shaky Six in a row makes it go... Join Date: Mar 2009 Location: Vacationland: Maine Posts: 1,346	Re: 69 GMC straight 6...how to tell what size it is? The above combined with the below might help: http://www.inliners.org/casting/numbers.html __________________ 67 C20 long step resto: http://67-72chevytrucks.com/vboard/s...d.php?t=342086 66 C10 long step build: http://67-72chevytrucks.com/vboard/s...=1#post3814790 CT to Alaska in a 67 C10: http://67-72chevytrucks.com/vboard/s...d.php?t=399224 “The height of sophistication is simplicity." - Clare Boothe Luce

10-09-2012, 07:57 PM	#4
da-burb "Ochre Ogre" Join Date: Apr 2000 Location: Springfield, MN Posts: 3,558	Re: 69 GMC straight 6...how to tell what size it is? take note of the fuel pumps in the pictures above, behind the motor mount is 292 only. In front of the motor mount is 250 and smaller. __________________ Bowtie Truck Stop Inc. Mid-West GM Truck Restoration Parts Supplier Your Key Parts, Auto Metal Direct, Dynacorn, and Goodmark dealer. like us @ www.facebook.com/BowtieTruckStop 1971 C-10 Suburban (Ochre) 1971 K-10 Suburban (Ochre) 1972 C-10 Suburban (Ochre) 1972 K-20 Suburban (Yellow- that just aint right!) Springfield, Minnesota 56087

10-09-2012, 11:32 PM	#5
70blackfish Registered User Join Date: Oct 2012 Location: Newhall CA Posts: 1,195	Re: 69 GMC straight 6...how to tell what size it is? I think its a 250ci....... thanks

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