'64 engine codes

65wagon · Poncho Master!

RE: '64 engine codes

65wagon · Poncho Master!

unknowingly you helped me with the numbers on my 70 28 thanks much 427

Beaumont4008 · Uber Guru

Looks like the letter suffix codes started at least in 67 as seen on Cndpont's GM paperwork for his 67. K0607KL

Facman · Member

Thought I would continue on this thread since there has been so much good info already shared. I am trying also to decipher a couple of engines that came with my 64 custom sport. One is in bad shape some of parts even missing, the other is all there! What I am trying to find out is which engine is the original, that's if I even have the original.

From the engine that is in bad shape the raised numbering on the back of the block is GM 3834812 and on the side is 4-B-8

The good engine raised numbers on the back are GM 3834810 and on the front pad below the head and stamped into the casing is 77 6425822.

The 4 barell intake stamped 3462509 with a date code E-31-7 is this 67 or 77

Heads stamped 378450.

Thanks

Frank

mr409 · Addicted!

327s in the small journal era-1962 thru 1967 if they were "low perf" like 250 horse engines used "Power Pack" heads. I believe the castings ending in '520' with 1.72 and 1.50 valves. These heads had small chambers approx 62cc. These same heads were also used on many 283s from the factory. I think this is where the confusion is coming from. As far as I know and I would bet money on this that there were NO factory 283 engines with "Camel Hump" or "Double Hump" heads. These heads had valves sizes of 1.94 and 1.50 or when used in high horse applications like 340 350 360 365 horse they had valve sizes of 2.02 and 1.60. If your 283 has a set of camel humps on it they were definitely added.

OURWAGON · Guru

I AGREE !!

4SPEED427 · A Poncho Legend!

mr409 wrote:

327s in the small journal era-1962 thru 1967 if they were "low perf" like 250 horse engines used "Power Pack" heads. I believe the castings ending in '520' with 1.72 and 1.50 valves. These heads had small chambers approx 62cc. These same heads were also used on many 283s from the factory. I think this is where the confusion is coming from. As far as I know and I would bet money on this that there were NO factory 283 engines with "Camel Hump" or "Double Hump" heads. These heads had valves sizes of 1.94 and 1.50 or when used in high horse applications like 340 350 360 365 horse they had valve sizes of 2.02 and 1.60. If your 283 has a set of camel humps on it they were definitely added.

You are talking all car lines? I don't know one way or the other but would the Corvettes have used the hump heads on 283's?

Beaumont4008 · Uber Guru

Carl Stevenson wrote:

mr409 wrote:

327s in the small journal era-1962 thru 1967 if they were "low perf" like 250 horse engines used "Power Pack" heads. I believe the castings ending in '520' with 1.72 and 1.50 valves. These heads had small chambers approx 62cc. These same heads were also used on many 283s from the factory. I think this is where the confusion is coming from. As far as I know and I would bet money on this that there were NO factory 283 engines with "Camel Hump" or "Double Hump" heads. These heads had valves sizes of 1.94 and 1.50 or when used in high horse applications like 340 350 360 365 horse they had valve sizes of 2.02 and 1.60. If your 283 has a set of camel humps on it they were definitely added.

You are talking all car lines? I don't know one way or the other but would the Corvettes have used the hump heads on 283's?

I would agree about the corvette 283. On the corvette forums they say the first double hump head was on the 61 315 hp fuel injected 283. (1.94 valves).

68sd · Canadian Poncho Superstar!

Beaumont4008 wrote:

Looks like the letter suffix codes started at least in 67 as seen on Cndpont's GM paperwork for his 67. K0607KL

1965 i believe

forespeed · Poncho Master!

64ragtop wrote:

With some great help from 64hardtop I think we have figured out what the engine in our car is. We think it's a 283 equipped with the (new for '64) 327 double-hump heads bringing compression up to 9.25:1. I checked the engine deck stamp last night and it's V299349. I'm gonna start checking myself but can anybody save me time? And if it is that block/head combo does anybody know if they raised the hp rating with the higher compression heads or was it still rated at 195. Whatever it is it does have duals and a 4 bbl now and with the Cherry Bombs it sure sounds sweet..(we had it out last night...)

64ragtop

I may have gotten lost somewhere in this conversation but if so help me out here. Doesn't the "V" indicate Flint and then I thought the next four digit's were the date code, at least it is on my Chevy, but 29 is not a month and 93 is not a day code. Then I thought the last two digit's "49" in this case were a suffix code indicating trans and I thing year.
My 64 SS Nova 283 block is F0927CF, F is for Flint, 09 for sept. 27 for day of the month and CF for 4spd 283 w/2bbl
Norm

Ghost Post · Poncho Master!

I've tried posting what I have on file for these Canadian Numerical Suffixes here in the past...yep I really need to lay 'em out and try again!.
Here's one of the past threads...there's been a few..
http://www.activeboard.com/forum.spark?aBID=118110&p=3&topicID=30373316

Yes there were unique Canadian Big Block Suffixes!.
Always keep in mind too how the same Canadian Suffix engines were used in many applications and not specific to chassis styles like 'regular' Suffixes were..

In the examples above, the '29' is the Suffix also in Facmans case the '77'.
Here's the '77' Suffix breakdown below..
My book only lists '65 and up cars and the '29' not listed so is different than the '65 #'s..
What RPO's on the GM Vintage docs of the '64 and is the engine original to the car?.

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Canadian Numerical Suffix # 77

1966 V8 Engine
283-2 Bbl. 195Hp

Applications included Canadian built;
- '66 Chevrolet Chevy-2
- '66 Pontiac Acadian
- '66 Chevrolet / Pontiac A-Body
- '66 Chevrolet / Pontiac B-Body

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65wagon · Poncho Master!

do we have one place to list just the engine codes for the canadian pontiacs, chevys to do a comparison. my green shop maual breaks done what the numbers represent

64ragtop · Addicted!

..just getting back onto this thread guys...so far the only numbers I have for our engine are the V299349 off the pass. side block deck directly in front of the head. My son currently has the GM documentation sheet with the engine number on it. We are virtually sure it's the original engine (looked totally unmolested with nothing missing when we got it and came with a 2 bbl. & single exh.), we're pretty darn sure it's a 283 (...GM docs say it came with a 283/195) and it definitely has the double-hump heads on it (whether original or retro-fitted). I still go back to the pic that one of the guys posted of that '64 owner's manual page stating that they installed 327 heads on 283's beginning in '64 (I don't know that to be true; I just saw it in print in that manual..), which would explain the engine being a 283 and it having double-hump heads. I still have to get in under that transmission kickdown lever mounting bracket or whatever it is and get that rear driver's side block no. I have little doubt it's a 283; it's just this head thing that seems to be so confusing, with a number of very knowledgeable people having conflicting views.

I do appreciate the time and effort everyone has taken on this...

Ghost Post · Poncho Master!

64ragtop wrote:

...so far the only numbers I have for our engine are the V299349 off the pass. side block deck directly in front of the head...
As mentioned previously the '29' of your # is the Suffix code..
Again sorry but the Canadian Suffix listings I have are only '65 & up so keep your eyes peeled for this on any info you see!.

Do you have the GM Canada Vintage Services report for this car?.
If so what engine info and RPO L-code is shown?.

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Somewhere above it's mentioned that Canadian Pontiacs only used the numeric identification systems on the small blocks and inline engines..
This is wrong and Canadian built Chevrolet and Pontiac A-Body, B-Body also Acadian/Beaumont car lines did indeed share the Numerical Suffix codes!.
These unique Canadian codes apply to 6 Cyl and SB engines also included MK1V's too!.

~

Beaumont4008 · Uber Guru

Ghost Post wrote:

64ragtop wrote:

...so far the only numbers I have for our engine are the V299349 off the pass. side block deck directly in front of the head...
As mentioned previously the '29' of your # is the Suffix code..
Again sorry but the Canadian Suffix listings I have are only '65 & up so keep your eyes peeled for this on any info you see!.

Do you have the GM Canada Vintage Services report for this car?.
If so what engine info and RPO L-code is shown?.

-----------------

Somewhere above it's mentioned that Canadian Pontiacs only used the numeric identification systems on the small blocks and inline engines..
This is wrong and Canadian built Chevrolet and Pontiac A-Body, B-Body also Acadian/Beaumont car lines did indeed share the Numerical Suffix codes!.
These unique Canadian codes apply to 6 Cyl and SB engines also included MK1V's too!.

~

I have to agree.

The monthly GM 66 Chevelle completion sheet on another thread shows the number system on small blocks for Canadian Chevelle's and Letter suffix system for the big blocks in 66.

Ghost Post · Poncho Master!

To add to the above, the unique Canadian Suffix codes were used up to and including 1968 model year cars..
Haven't seen any before but it's possible some '69 cars were delivered w/ them...never say never right!.

As for any Canadian only MK1V Big Block codes, some were Alpha-Numeric (technically Numeric-Alpha)..

More on file at home but here's a few Canadian MK1V codes I have at hand..

Suffix 3T = L36/385 - 4-Speed - '68 B-Body

Suffix 4T = L35/325 - Manual - '68 A-Body

Suffix 4U = L34/350 - Manual - '68 A-Body

Suffix 4W = L34/350 - Automatic - '68 A-Body

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64ragtop · Addicted!

...here's the Engine No. from our GM Vintage Services documentation - #834472644. I have no idea what that # means. Need some professional help here guys...!

Ghost Post · Poncho Master!

64ragtop wrote:

...here's the Engine No. from our GM Vintage Services documentation - #834472644. I have no idea what that # means. Need some professional help here guys...!

Unless you don't feel comfortable doing so, please lay your GM Canada info out here..

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64ragtop · Addicted!

...we mounted it under glass and framed it w/some pics of the car as a present to our son for his office and the framer forgot to take a photocopy of the GM info beforehand as per our instructions! I'll take a pic as soon as I can and post it here...

65wagon · Poncho Master!

83 powerglide
4 64
4 283
7..... engine production

64ragtop · Addicted!

...thanks 65wagon...

65wagon · Poncho Master!

some where in the forum i posted a bunch of my numbers and a way of decoding them if anyone has the time to put it in one spot