Miscellaneous "1970 Chevelle"/Chevrolet decode information ............
1970 Chevelle "production numbers" ....
The info I have, on 1970 Chevelle SS 396's numbers say,
RPO Z25 (SS396) coupes, convertibles, & El Caminos ---- = 53,599 total built..
RPO L34 (350hp) 396 V-8 ----- = 51,437 ...
RPO L78 (375hp) 396 V-8 ------ = 2,144 ...
RPO L89 (L78 w/aluminum heads) -- = 18 ...
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1970 Chevelle SS 454's numbers,
RPO Z15 (SS454) coupes, convertibles, & El Caminos ---- = 8,773 total built..
RPO LS6 (450hp) 454 V-8 ----- = 4,475...
RPO LS5 (360hp) 454 V-8 ----- = 4,298...
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Total # 1970 Chevelle Super Sports, all engines, coupes, convertibles, & El Caminos -- = 62,372
1970 Tonawanda production records for 402/350HP on L-34 Chevelle- Camaro- Nova:
*28,414 engines produced w/Man.Trans coded CTX.
*31,004 engines produced w/Auto. Trans. coded CTW.
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= 59,418 Total engines produced
Add to that..
*51,437 1970 Chevelle/Elco L-34 Super Sports made.
*1,864 1970 Nova L-34 Super Sports made.
*1,802 1970 Camaro L-34 Super Sports made.
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= 55,103 Total cars made.
Take total cars made from total engines produced, = 4,315 engines left over for Service Useage.
The figures I got from Fran Preve, the Tonawanda Plant Historian are: 8,121 LS-5 360HP Engines, which does include Monte SS454.
The Chevelle figures as recorded by Tonawanda are 2,763 (Man Trans) and 2,197 (AT) for a total of 4,960. Of these 662 were made as service engines, leaving total Chevelle LS-5 car production as 4,298.
I do not have the service engine breakdown for Monte Carlo, so I cannot give you an exact figure, but subtracting the 4,960 from the 8,121 gives a maximum of 3,161. I may have some info on LS-5 optioned Vettes and if so, will post tomorrow. Keep in mind, many more blocks were made in the 1970 year for service useage including service for 69 and earlier 427 applications. Those service engines made in 1970 will use the #512 block, so an exact figure will be impossible to document.
Jeff Dotterer
Former NCOA Senior Judge
1970 Chevelle 'monthly ending' VIN numbers ..............
Here's a list of 1970 Chevelle monthly ending VIN's by assembly plant .... Rick
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Earliest documented, 1970 LS6 /and/ LS5 Chevelle Super Sports ............
http://www.chevelles.com/forums/showthread.php?t=122619
[ Originally Posted by mr ]
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1970--------TRIM----BUILD-----ENGINE------POSTEDBY-----DATEPOSTED--
CHEVELLE----TAG----SHEET-----CODE-------USERNAME-------ON THIS-----
FACTORY----DATE----DATE-----option-----Team Chevelle-----WEBSITE----
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Baltimore----12B---12/09/1969----LS6--------greg2001-------08/30/2005
Leeds/KC----12B---12/11/1969---LS6----------RixLS6---------04/10/2006
Van Nuys----12C---12/15/1969---LS6-----------mr70---------04/11/2006
Atlanta------12C---12/15/1969---LS6-------Dave Birdwell-----03/19/2006
Arlington----01A---(---------)----LS5----------LevonH---------02/12/2006
Oshawa-----01B--01/12/1970----LS5-----------RC70----------11/18/2004
Flint--------03B---(---------)----LS6------(F/S/on e-bay)-----03/31/2006
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So far.....
earliest known Z15 built, LS6 hardtops........
(#1).. 1st known and documented 1970 Chevelle SS/ LS6 was built at Baltimore, Tuesday Dec.09,1969.
(#2).. 2nd earliest documented...LS6/was built at Leeds/KC...Thursday Dec.11,1969 .....
So far.....
earliest known 1970 Z15 built, LS5 hardtops........
(#1).. 1st known and documented 1970 Chevelle SS/ LS5 was built at Leeds/KC Monday Dec.15,1969 .....
..
The earliest known 1970 Z15 built, convertibles ..... so far .......
(#1) The 1st documented 1970 Z15 Chevelle SS/ LS6 convertible, so far, was built Tuesday Dec.16,1969 at Baltimore ........
(#1) The 1st documented 1970 Z15 Chevelle SS/ LS5 convertible, so far, was built Wed. Dec.17,1969 at Van Nuys ..........
(#4,475)
Last known built Z15 Chevelle SS / LS6, so far, was built [07C] at Leeds/KC. Monday July 20,1970 ......
http://www.chevelles.com/forums/showthread.php?t=142058
This is a quote from Rick Peters from the archives.
I have collected quite a bit of Literature on this subject.
All the U.S. and Canadian dealer price books continuely say that this option was only available early in producton for the 1970 Chevelle and Elcamino.
October 30th 1969 is one letter from Chevrolet to Dealers stating:"The L-78 opition IS IN PROCESS of being cancelled".
Novenber 7th 1969 is a Charleston Zone letter stating:"The L-78 option IS BEING CANCELLED in view of the newly released 454 CID engines".
And finally a November 20th 1969 Product Bulletin stating:"With the release of SS 454 engines,Option Z-25/L-78 375HP 396 V8, and Option Z-25/L-78/L-89 375HP 396 V8 with Aluminum cylinder heads ARE NOW BEING CANCELLED.
This Does not pertain to Novas and Camaros which could have this option After Jan.1970 of course.
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1970 Chevelle engine codes .........
http://www.yearone.com/updatedsinglepages/Id_info/gm_engine_id/gmidimages/chevelle70.jpg
http://www.yearone.com/updatedsinglepages/Id_info/gm_engine_id/engineinfo6.html
Optional Chevrolet engines, up to the 1971 model year, here's how GM lists them:
[ Originally Posted by Dale McIntosh ]
L22 L-6 Engine - 250 Cu. Inch.
L26 L-6 Engine - 230 Cu. In.
L30 V-8 Engine - 327 Cu. In.
L34 V-8 Engine - 396 Cu. In. Hi-Perf.
L35 V-8 Engine - 396 Cu. In.
L36 V-8 Engine - 427 Cu. In. Hi-Perf.
L46 V-8 Engine - 350 Cu. In.
L48 V-8 Engine - 350 Cu. In.
L62 P-6 Engine - Hi-Perf.
L63 P-6 Engine - Spec. Hi-Perf.
L65 V-8 Engine - 350 Cu. In. (2 Bbl. carb.)
L66 V-8 Engine - 396 Cu. In. (2 Bbl. Carb.)
L68 V-8 Engine - 427 Cu. In. - Hi-Perf. - Tri Carb.
L71 V-8 Engine - 427 Cu. In. - Spec. Hi-Perf. - Tri Carb.
L72 V-8 Engine - 427 Cu. In. - Spec. Hi-Perf.
L73 V-8 Engine - 396 Cu. In. - Spec. Hi-Perf.
L78 V-8 Engine - 396 Cu. In. - Spec. Hi-Perf.
L79 V-8 Engine - 327 Cu. IN. - LD - Spec. Hi-Perf. (Hyd. Lifters)
L85 L-6 Engine - 250 Cu. In. (4 Bbl Carburetor)
L87 P-6 Turbo Charged Engine
L88 V-8 Engine - 427 Cu. In. Heavy Duty
L89 Aluminum Cylinder Heads
LF7 V-8 Engine - 327 Cu. In. (2 Bbl Carb.) (Reg. Fuel)
LM1 V-8 Engine - 350 Cu. In. (4 Bbl Carb.) (Reg. Fuel)
LS1 V-8 Engine - 427 Cu. In. (4 Bbl Carb.) (Reg. Fuel)
LS3 V-8 Engine 400 Cu. In. 4 Bbl. Carb.
LS4 V-8 Engine 454 Cu. In. 4 Bbl. Carb.
LS5 V-8 Engine 454 Cu. In. 4 Bbl. Carb. Hi-Perf.
LS6 V-8 Engine 454 Cu. In. 4 Bbl. Carb. Spec. Hi-Perf.
LS7 V-8 Engine 454 Cu. In. 4 Bbl. Carb. Heavy Duty
LT1 V-8 Engine 350 Cu. In. Special High Performance
"But remember that some of the options codes, were reused in later years"...
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1970 Chevelle Super Sport .... turbo-400 transmissions codes .. found on 1970 model buildsheets ....
(CF) = L34 Chevelle SS396 (350hp)
(CR) = LS5 Monte Carlo SS454 (360hp)
(CS) = LS5 Chevelle SS454 (360hp)
(CW)= L78 Chevelle SS396 (375hp)
(CY) = LS6 Chevelle SS454 (450hp)
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According to "Chevrolet by the numbers" 1970-75 by Alan L. Colvin,
'these are all, the 1970 turbo 400 codes listed' .....
(CA)= 400 (Chevrolet)
(CB)= 454 (Chevrolet)
(CD)=400 (Chevelle & Monte Carlo)
(CF)=402 (Chevelle, Camaro & Nova)
(CG)=454 (Police)
(CJ)=402 (truck 10-30 series)
(CK)=350 (Corvette)
(CR)=454 (Chevelle)
(CS)=454 (Chevelle, Monte Carlo & Corvette)
(CW)=402 (Chevelle, Camaro & Nova)
(CY*)=454 (Chevelle & Corvette) ..... (* high shift point) .......
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1963 - 1974 Muncie M20/M21/M22 4 speed numbers information, ect...
Muncie case casting numbers, relating production years and ratios available ...
http://www.muncie4speed.com/
[ Originally Posted by Rodeo73 ]
Casting: 3831704 Years: 1963 Only Ratios: M20 2.56 1st , M21 2.20 1st
Casting: 3851325 Years: 1964 - 1965 Ratios: M20 2.56 1st , M21 2.20 1st
Casting: 3885010 Years: 1965 - 1967 Ratios: M20 2.52 1st , M21 2.20 1st, M22 2.20 1st
Casting: 3925660 Years: 1968 - 1970 Ratios: M20 2.52 1st , M21 2.20 1st, M22 2.20 1st
Casting: 3925661 Years: 1970 - 1974 Ratios: M20 2.52 1st , M21 2.20 1st, M22 2.20 1st
Ratios of the M20 , M21 , M22
Year 1963-1965 Type: M20 Rings: None Ratio: 2.56 / 1.91 / 1.48 / 1.00 / 3.16
Year 1966-1974 Type: M20 Rings: Two Ratio: 2.52 / 1.88 / 1.46 / 1.00 / 3.11
Year 1963-1974 Type: M21 Rings: One Ratio: 2.20 / 1.64 / 1.28 / 1.00 / 2.27
Year 1967-1974 Type: M22 Rings: None Ratio: 2.20 / 1.64 / 1.28 / 1.00 / 2.27
Input Shaft Tooth and Spline Count Related to Year
Year 1963-1965 Type: M20 Rings: None Spline: 10 Tooth Count: 24
Year 1966-1970 Type: M20 Rings: Two Spline: 10 Tooth Count: 21
Year 1970-1974 Type: M20 Rings: Two Spline: 26 Tooth Count: 21
Year 1963-1970 Type: M21 Rings: One Spline: 10 Tooth Count: 26
Year 1970-1974 Type: M21 Rings: One Spline: 26 Tooth Count: 26
Year 1967-1970 Type: M22 Rings: None Spline: 10 Tooth Count: 26
Year 1969-1974 Type: M22 Rings: None Spline: 26 Tooth Count: 26
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1970 Chevelle SS '12 bolt rearend codes' ...
[ Originally Posted by mr70 ]
L-34 [SS396/350hp]
(CW) - 3:31
(CF) - 3:31 Posi
L-78 [SS396/375hp]
(CKJ) - 3:55
(CKF) - 3:55 Posi
(CKK) - 4:10 Posi
LS-5 [SS454/360hp] -and- LS-6 [SS454/450hp]
(CRU) - 3:31
(CRV) - 3:31 Posi
(CRW) - 4:10 Posi
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12 bolt 'car' Posi-traction carrier numbers ...........
[ Originally Posted by big gear head ]
Casting ID numbers on the "12 Bolt Posi Carrier" .........
(ED-32088) for the 2 series,
(EDB-30140) for the 3 series,
(EDB-30174) for the 4 series.
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1964-1972 Chevelle rearend casting numbers .........
[ Originally Posted by David_Bates ]
Chevelle "housing casting numbers", I have personally observed over the decades:
12-Bolt Housing: Casting #
1965 Chevelle (3859140N)
1966 Chevelle (3875745N)
1967 Chevelle (3894939NF)
1967 Chevelle-Late (3917124NF)
1968-Early 69 Chevelle (3917124NF)
1969 Chevelle (3959038NF)
1970-72 Chevelle (3969278NF)
10-Bolt Housing: Casting #
1964 Chevelle (3839390N)
1965 Chevelle (3959139N)
1966 Chevelle (3875744N)
1967 Chevelle (3894938NF)
1968 Chevelle (3917123NF)
1969 Chevelle (3859037NF)
1970-72 Chevelle (3969277NF)
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1970 Chevelle radiator codes ..........
[ Originally Posted by mr70 ]
For 1970,the standard Radiator for those three applications was the 3 row radiator, as well as the L-78 engined Chevelle.Transmission type did not dictate it.
When Air Conditioning was ordered on the L-34, or a 4:10 Rearend was equipped on the LS-5, LS-6, then they would receive the 4 row HD radiator automatically. But when the L-78 came equipped with a 4:10 rearend, it still was built with the Standard 3 row radiator.
1970 Chevelle STANDARD radiator suffix tag codes:
*L-34 Manual- (BE)
*L-34 TH400- (BK)
*L-78 Manual- (BO)
*L-78 TH400- (BJ)
*LS-5 & LS-6 Manual- (BQ)
*LS-5 & LS-6 TH400- (BR)
1970 Chevelle A/C & HEAVY DUTY Radiator Suffix Codes:
*L-34, L-78 & LS-5, LS-6 Manual- (PA)
*L-34, L-78 & LS-5, LS-6 TH400- (PD)
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1970 Chevelle dealer zone and dealer name/and/number ........
http://www.chevelles.com/forums/showthread.php?t=27210
[ Originally posted by Dale McIntosh ]
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