Need help decoding a 327... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

akubovic · 09-16-2009, 06:47 PM

I am working on a 66 c20. It's an Canadian built truck (Oshawa Truck Plant, Ontario). It was originally a 6cylinder 3 on the tree but was converted to a 327, auto overdrive tanny 2 owners before me (so I'm told). I found this code stamped behind the alternator. "C51108670 K10 03 TXD". I figure K10 means it came from a K10 but other than that I can't make sense of it. Does anyone have more decoding experience than I do. Any help would be appreciated.

PhilaTruck · 09-16-2009, 09:37 PM

You gotta look at the back end of a dog to tell what it is. (Not that I don't like 327s, I do.) Same with engines.

Look here for casting locations.

Then, once you get the number (behind the dizzy) decode it here.

Good luck-

1968SWBBigBlock · 09-16-2009, 10:01 PM

TXD 1975 350 conv.cab L LS9 165 4 C-20 to 3500

akubovic · 09-17-2009, 06:32 AM

Thanks guys, I will check the rear of the block today.

**Captainfab** · 09-17-2009, 11:57 PM

Quote:

Originally Posted by 1968SWBBigBlock

TXD 1975 350 conv.cab L LS9 165 4 C-20 to 3500

Quote:

Originally Posted by akubovic

Thanks guys, I will check the rear of the block today.

1968SWBBigBlock already looked up the build code for you. Looks like it is a 350 instead of a 327. That is unless someone dropped in a large journal 327 crank. The casting numbers will only give you a general idea on what it is. It is sometimes left open to 2 or 3 different CID possibilities. It wouldn't hurt to look it up though.

09-16-2009, 06:47 PM	#1
akubovic 66 C20 Long Step Join Date: Apr 2009 Location: Peterborough, Ontario, Canada Posts: 67	Need help decoding a 327... I am working on a 66 c20. It's an Canadian built truck (Oshawa Truck Plant, Ontario). It was originally a 6cylinder 3 on the tree but was converted to a 327, auto overdrive tanny 2 owners before me (so I'm told). I found this code stamped behind the alternator. "C51108670 K10 03 TXD". I figure K10 means it came from a K10 but other than that I can't make sense of it. Does anyone have more decoding experience than I do. Any help would be appreciated.

09-16-2009, 09:37 PM	#2
PhilaTruck Right on the line, baby! Join Date: Oct 2003 Location: Phila, PA 19130 Posts: 1,486	Re: Need help decoding a 327... You gotta look at the back end of a dog to tell what it is. (Not that I don't like 327s, I do.) Same with engines. Look here for casting locations. Then, once you get the number (behind the dizzy) decode it here. Good luck- __________________ 83 GMC 406 th400/3.73 Eaton Truetrac posi, headers, x pipe, & racePros. Tubular control arms, lowering rear springs, caltracs. Still ugly, but getting built right, although slowly Click and scroll down for site vendors! Subscribe here!

09-16-2009, 10:01 PM	#3
1968SWBBigBlock Active Member Join Date: Oct 2006 Location: Ohio Posts: 1,643	Re: Need help decoding a 327... TXD 1975 350 conv.cab L LS9 165 4 C-20 to 3500 __________________ 1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles 18.5" x 31" Hoosier Pro Street Radials ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree

09-17-2009, 06:32 AM	#4
akubovic 66 C20 Long Step Join Date: Apr 2009 Location: Peterborough, Ontario, Canada Posts: 67	Re: Need help decoding a 327... Thanks guys, I will check the rear of the block today.



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