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#1 | |
Registered User
Join Date: Jul 2013
Location: Rockwell, NC
Posts: 1,639
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Re: numbers matching? original engine?
Quote:
I have a unique connection to the engine. I was born in St. Catharines in Feb of 1970. The engine was built a couple miles down the street just a few months later (St. Catharines was a big automotive town- has the GM engine/powertrain plant, had a Dana rear end plant, TRW was in the same part of town). My uncle was putting pistons on rods in that plant when my engine was built. I went to college for mechanical engineering thinking i could get a job there but after my second year they were laying off people and talking about moving to Mexico so my career path went in a different direction. I've pulled out the engine for an LS monster build and sold most of the sbc but kept the block. Dont know what i will do with it but wont ever sell it.
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1970 C-10 LWB "Blu" Instagram (current build pictures) 70_nc_c10 |
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#2 |
Registered User
Join Date: Apr 2005
Location: Cheyenne, WY
Posts: 742
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Re: numbers matching? original engine?
Interesting. If you have access, would you snap a photo of the casting numbers. I found that my casting numbers are on the side of the block versus on the rear transmission mount area. I was thinking this was unique to Catherines engines but not sure if they are all the same.
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#3 | |
Registered User
Join Date: Jul 2013
Location: Rockwell, NC
Posts: 1,639
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Re: numbers matching? original engine?
Quote:
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1970 C-10 LWB "Blu" Instagram (current build pictures) 70_nc_c10 |
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#4 | |
Registered User
Join Date: Jul 2013
Location: Rockwell, NC
Posts: 1,639
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Re: numbers matching? original engine?
Quote:
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1970 C-10 LWB "Blu" Instagram (current build pictures) 70_nc_c10 |
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#5 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,382
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Re: numbers matching? original engine?
Im in the camp that values originality. For others who want to rebuild their original sb motors be mindful of decking the block as this can remove the codes from the machined pad on the rh side of the block. For fun here are the stamped codes on the original 350 motor and th 350 tranny now rebuilt and ready for more decades of use back in my Highlander Blazer: http://67-72chevytrucks.com/vboard/s...8&postcount=60 - i have the POP for same.
I drove to texas to get a code correct (albeit not original) 350 motor when i rebuilt my 72 k20 but bolted it to a 700r4 ![]()
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() Last edited by DeadheadNM; 07-17-2017 at 01:59 PM. |
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#6 | |
Senior Member
![]() Join Date: Aug 2013
Location: Ca. <-> Ma.
Posts: 5,709
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Re: numbers matching? original engine?
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This was/is common practice when restoring muscle car Of the 50's,60's and early seventies You see it advertised all the time when. These cars are being sold. "Numbers Matching" I had a 57 vette, back in the day. With incorrect motor When it blew up. I bought correct block from here out west Had to get correct heads from a guy in Chicago This was before internet was so dialed in Hemings Motor News , was the google search option back then When that car sold It was worth many thousands more Than it would have been If it was not #s matching I know, it is not as valuable to most on these trucks But I still am also fan of originality. |
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#7 |
Registered User
![]() Join Date: Oct 2011
Location: Victoria, B.C
Posts: 3,794
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The number one thing that has prolonged engine life and extended it up to the 300K and beyond mark....is electronic engine management.
Basically a new fuel injected engine is running in perfect tune 99.999% of the time with respect to air/fuel mixture, timing, etc. Supposedly when you tear down a 100K motor now...inside it looks like new. No carbon deposits or plugged oil galleries, etc. That is why the mileage is better as well....perfect, optimum tuning. Plus you can run higher compression again these days and if the engine starts to 'ping' and pre-detonate...the engine simply retards the timing automatically and electronically with the anti-knock sensors until it stops...thus protecting the engine.....ba-da-bing! As a result they have been able to bump up the compression ratios again from the 1970 and 1980 engines...which were pretty low. On the older carburated engines you were lucky if it stayed in original tune for a month. You would literally have to to tune it daily to have it compete for the near perfect range a modern engine runs in. ....basically not even a practical comparison. Regardless...from a hobby standpoint....I still love tuning my old 350....carb and all!! all Good Coley
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....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 |
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#8 | |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: numbers matching? original engine?
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#9 |
Senior Member
![]() Join Date: May 2010
Location: Wisconsin & Arizona
Posts: 4,844
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Re: numbers matching? original engine?
In post 44 I showed pictures of my Protect-O-Plate and the pad stamping. Here is a more readable mirror image of the P-O-P, the casting date from the rear of the block, a repeat of the engine date stamp, the TH400 tag, and the ID on the Eaton H052 axle .
- Engine cast date: K278= Nov 27, 1968 (not on P-O-P) - Engine pad stamp: V1130XD= Nov 30 (1968) assembly. XD= 1969 350, turbo hydramatic, 4 barrel, C-10 to C-35 trucks. - TH400 tag: 69T 328= 328th day (1968). 1968 was a leap year so this corresponds to Nov 23. 1968. - Axle ID: JU1122J1= Nov 22 (1968) (P-O-P shows JU1120J. The axle is original. GM has been known to make mistakes.) It's interesting that the selling dealer chose to put the miles at delivery (00034) on the P-O-P rather than the delivery date as on the other P-O-Ps shown on this thread. Last edited by FirstOwner69; 07-17-2017 at 04:59 PM. |
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