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#1 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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One for the small block decoders
I picked up this small block this morning ,it's a fresh rebuild and I bought it for less than the cost of the parts showing .New hei dist /wires/starter/water pump/fuel pump/ rams horn exhaust/ Edlebrock C3BX intake/ Nice valve covers and Holly double pumper . I paid $300.00 for it loaded in my truck .
VI208TBC 3970010 Last edited by Grumpy old man; 12-14-2017 at 03:40 PM. |
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#2 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: One for the small block decoders
http://www.mortec.com/castnum.htm has all your answers.
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#3 |
Registered User
Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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Re: One for the small block decoders
1970 350ci truck engine (TBC) V= made in Flint engine plant. Date is either I 208(208th day of September) or 12/08 8th day of December. Casting number was used for 1968 327 and 69-79 350 ci engines. It has an earlier style intake on it with the oil fill tube.
Nice score!
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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
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#4 |
Registered User
Join Date: Feb 2015
Location: Alberta, Canada
Posts: 148
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Re: One for the small block decoders
Disclaimer: I can neither confirm nor deny the accuracy of the information below:
The resource I use (nastyz28.com) gives 3 options based on the "TBC" suffix code: '70 350, C-10 to 3500, automatic transmission 255HP 4 Barrell Intake '70 350, K-10 & 20, 3-spd manual transmission 255HP 4 Barrell Intake '79 350, C-10 to 2500, manual transmission L LS9 165 HP 4 Barrell Intake Info based on the 3970010 casting number gives 2 options: '68 327 2-bolt main A body '69-'79 350 185 to 370 HP 2/4 - bolt mains car, truck, vette And I interpret the date stampings on the back of the block as follows: 9 - last digit of year block was cast L10 - L is the month the block was cast, since L is the 12th letter in the alphabet this block was cast in December and 10 is the day of the month. So, from here you kind of have to combine all the data and come up with something that satisfies all the different stampings. I would I.D. this as: '79 350 low compression truck engine with just under 200HP. Probably came with a SM465 - 4 speed manual transmission. Since it has been rebuilt, it is very likely that the heads are not the original ones that came with the engine, which could greatly increase the HP value. All in all its probably a typical work duty truck engine.
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'67 c10 cst farm truck |
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#5 | |
Registered User
Join Date: Feb 2015
Location: Alberta, Canada
Posts: 148
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Re: One for the small block decoders
Quote:
On closer look, the 9 looks like it could be an 8 or a 3. That confuses things a little more. The suffix code search only gives us two different years as a possibility: '70 or '79 The casting number search however provides data that is more plausible: '68 - 327 '69-'79 - 350 So, if we ignore the suffix code (TBC) the possibilities are: If the number is an 8: 1968 327 block 1978 350 block If the number is a 3: 1973 350 block This frustrates things a little but I know from firsthand experience that it is possible to have a block that has conflicting information stamped/cast into it. The original 283 block that came with my '67 custom has a suffix code that only matches up with a 307. In C-10's 307's first came in 1968 and they had breathers in the valve covers. So when all else fails, open it up, measure the bore and stroke and do the math. In your case large journal 327's and 350's are the same block so with the exception of the crankshaft (which could have easily been replaced) its not really possible to know for sure.
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'67 c10 cst farm truck |
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#6 | |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,444
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Re: One for the small block decoders
Quote:
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#7 |
Registered User
Join Date: Oct 2009
Location: Tampa Bay
Posts: 1,549
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Re: One for the small block decoders
Hey Grump, You got everything you need there to positively identify your block.
VI208TBC 3970010 L10 L10 is the casting date L = December 1 = December 1st 0 = 1970 Your block was cast on December 1st 1970 3970010 in 1970(or 1971 see below) is a 350cid. VI208TBC is V1208TBC I's used for 1's is very common when found stamped on Blocks. 1208 = December 8th Your Block was cast December 1st and assembled on December 8th in 1970. Casting Date codes are the day, month and year they say they are, but Suffix codes go by Model Year. Your block is December of 1970 which is the 1971 Model Year. So when you look up TBC you have to do it for 1971. In 1971 TBC = 350cid, 255hp, 350auto, LS9, 4bbl, 10,20 C or K So you have a 1971MY 350 Truck motor. Great price. BTW
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CHEVY/GMC VIN DECODERS Last edited by bruceman1968; 12-15-2017 at 09:16 AM. |
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#8 |
Registered User
![]() Join Date: Mar 2013
Location: Syracuse, Utah
Posts: 499
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Re: One for the small block decoders
Definitely a nice score!
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Justin '67 C20 CST Custom Camper '04.5 LLY Duramax CCSB...sold |
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#9 |
Registered User
Join Date: May 2009
Location: Monroe, LA
Posts: 2,105
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Re: One for the small block decoders
Looks like a very good score to me. Congrats!
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Keith SOLD - 1963 C10 Short Fleet 350/700R4 4/6 drop 1967 GMC Super Custom - Short Fleet COPO concept w/427 BBC T-400 w/Doug Nash overdrive 4/6 Drop, Buddy Buckets, etc... Frame Off (In Progress) I call it "Vulgar Display of Power" 1980 Silverado Original paint 49k Original miles 4/6 drop Check out my build thread here: http://67-72chevytrucks.com/vboard/s...=1#post6209941 |
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#10 |
Registered User
Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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Re: One for the small block decoders
I think you may have committed grand theft for $300!
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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
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#11 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: One for the small block decoders
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#12 |
BlahBlahBlah
Join Date: Feb 2002
Location: Wa.
Posts: 19,884
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Re: One for the small block decoders
What size is that carb? I'm not even close to an expert on engine builds but it looks like a lot of carb for that engine. Guess it depends on the internals though. You did say the cam profile doesn't look to be stock. Are you gonna pop the heads?
Little block and accessory clean and paint. Get rid of the ugly (IMO) ball milled valve covers and put some vintage aluminum finned covers, and you are off to the races.
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#13 | |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: One for the small block decoders
Quote:
Yeah that carb may be too much but I won't know until I start it today I'll pull it apart just to know for sure what they did to it , I'm already thinking of using the cowl intake plenum I have going to this spectre air intake carb plenum , I've been collecting all the pieces to use it on my tri power 292 but it might look cool mounted to this small block ? I did some digging and the Edlebrock C3-BX aluminum intake is old school 70's before the Performer intakes came along ,From what I've read they work really good and a lot of the C2 vette guys like them ? http://www.jegs.com/i/Spectre/865/9849/10002/-1 Last edited by Grumpy old man; 12-16-2017 at 09:14 AM. |
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#14 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: One for the small block decoders
WOOOOO HOOOOOO !!! Runs perfect ! I've spent $$$$$$ on some small blocks that didn't run like this does .
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#15 |
Senior Member
![]() Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: One for the small block decoders
I pulled the pan and found a 4 bolt , new crank, new pistons,new cam that looks good ,rods appear to have been balanced ,Everything looks great !
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#16 |
Registered User
Join Date: Aug 2009
Location: Alden NY
Posts: 2,705
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Re: One for the small block decoders
Can't beat that deal!
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1961 C1 Corvette 1959 El Camino 350 TPI, 9" 4 w disc 69 Blazer K5 - sold July '20 2021 Durango RT 5.7 |
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#17 |
Senior Member
![]() ![]() Join Date: Sep 2008
Location: Harrison, Arkansas
Posts: 9,816
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Re: One for the small block decoders
A home run I would say.
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other Larry Build thread, Arkansas K10 https://67-72chevytrucks.com/vboard/...=755797&page=5 The ability to speak several languages is an asset, but the ability to keep your mouth shut in any language is priceless. |
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#18 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,858
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Re: One for the small block decoders
With that dbl pumper I'd expect some changes have been made internally, like came at least
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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