need to decode this engine, in 69 GTO , but not original

PMD-242 · Member

need to decode this engine, in 69 GTO , but not original

4SPEED427 · A Poncho Legend!

The L130 should mean November 13th 1970 from what I've seen. Normally they skipped "I" to avoid confusion with a "1". Not that that will make a lot of difference because as you say, maybe it's an 8.

PMD-242 · Member

THANKS FOR THE REPLY, THE L130 # JUST DONT FIT , 70 WOULD BE RIGHT YET BLOCK DOES NOT HAVE 5 MOUNT HOLES SO IT CANT BE A 70 , THATS Y I THINKING HE GOT IT WRONG , AN 8 WOULD WORK , STILL CANT FIND 9785581 ANY WHERE, OTHER 978, HAVE BEEN 67 OR 68, AND THE OTHER THING IS AS FAR AS I KNOW THE YE WAS NOT MADE IN 1970, I GOING TO HAVE A LOOK MYSELF TO SEE IF #ARE RIGHT , HIS COWL TAG IS ST 6924267 BAL 584797, WOULD U NO WHAT 584797 MEANS, AND WHAT WOULD ( ST ) MEAN,I KNOW THE REST ,THANKS AGAIN

Beaumont4008 · Uber Guru

That number 9785581 shows as the casting number for a BOP aluminum bell housing not a block number. Strange. Maybe your buddy gave you the wrong number.

PMD-242 · Member

THANKS FOR REPLY, THAT COULD EXPLAIN WHY I CANT FIND IT, WILL HAVE TO CHECK FOR MYSELF,JUST DECODED MY ENGINE , FOUND OUT ITS A 69 NOT 70 LIKE MY CAR , BUT AM HAPPY 69 WHERE BETTER , HIGHER COMPRESSION THAN 70 , 10.75.1 NOT BAD FOR STOCK, AND U SAY THAT # IS FOR A BELLHOUSING I DO BELIVE HE WENT 4 SPEED , THANK YOU , CHEERS

unburt · Guru

Nice car love the body style and welcome. You will definatley will have to run 91 or better octane with those heads . The chamber is a 72cc with big valves they do work well , with iron heads its critical the timing is bang on and a good cooling system is in place.
The motor will be a torque producer . What intake/carb do you plan on using.

PMD-242 · Member

THANKS FOR REPLY, I JUST BOUGHT AN REPLACEMENT Q JET, FOR 317$ PLUS OLD CARB ,GOOD PRICE WITH OUT OLD CARB IT WOULD HAVE BEEN OVER 700$ , THEY ARE HARD TO FIND , COULD NOT EVEN FIND ONE FOR A 1970 ENGINE, THEN I FIGURED OUT I HAD A 69,AND WAS ABLE TO FIND REBUILD FROM AUTOLINE, IM USEING STOCK MANIFOLD , MAY GO ALUMINUM ONE DAY BUT I DO WANT TO KEEP Q JET, AS FOR GAS I USE 94 OCT,CHEVRON , PLUS LEAD SUPTISTUTE. SEEMS TO LOVE IT. I JUST GOT NEW FENDERS ,MOUNTS BUSHINGS ,CARB, CARPET,GAS TANK, AND MANY STILL NEEDED, CANT WHAT TILL SPRING , HAS BEEN OFF ROAD SINCE 1995, GLAD I KEEP HER, CAN YOU GIVE ME ADVICE ON REPLACING QUARTER PANELS, TRUNK PATHES, LIKE WHAT WOULD YOU DO FIRST, CHEERS

dcneric · Poncho Master!

Welcome aboard Darrel.

Like you surmised the engine in your car appears to be from a 69 GTO. The date code on the heads seems to indicate a casting date of March 25/26 69 way to early to have been original in your 70. Never the less, a damn good motor. The carb from a 70 would fit the 69 or vise versa as the manifold was the same, just the little bolt on linkage is unique to each year and carb. Pontiac engineers invested a great deal more time in the design and function of their intake manifold than other car makers as it is an exceptionally good design. Compared to the Edelbrock Performer the Pontiac intake out performs and is a near equal to the RPM. A single plane intake is another story as it has a limited street use. If deciding to rebuild your engine there is a very well regarded Pontiac engine builder in Vancouver, SD-Perfomance (http://www.sdperformance.com/ ).

There is another fellow currently working on a 70 as well and just posted a couple days ago with pictures of his progress. For the life of me I cant find it, sorry.

PMD-242 · Member

HI THANKS FOR REPLY, THE 70 CARB HAD DIFFERENT LINE HOOK UPS IN A PIC I SEEN , THE 69 CARB I BOUGHT WAS SAME AS I HAD ON BEFORE, 70 MODEL SEEM TO BE MISSING ONE, MY INTAKE DATE IS D019,APRIL FOOLS DAY 69, AND DOOR STICKER SAYS 11/69, ITS MY CARS BIRTHDAY THIS MONTH, I DONT THINK THE MOTOR WAS REPLACED,BUT DONT KNOW SURE, THE GUY I GOT IT FROM SAID HE REBUILD IT IN 1986 AND SAID IT WAS ORIGANAL, I THINK IT COULD BE , IF I GOT IT CHECK OUT BY GM OR PHS WOULD THEY HAVE THAT INFO , I WOULD LOVE TO KNOW FOR SURE, I PROBLY WILL STAY WITH IRON INTAKE, BUT I DO PLAN ON GETTING RAM AIR 3 EX MANIFOLDS, I HAD HEADERS BEFORE BUT WENT BACK TO STOCK MANIFOLDS, WITCH DO YOU THINK WOULD BE BEST, DO YOU KNOW WHAT IS DIFFERENT BETWEEN MY 350HP YS, AND A RAM AIR 3, I KNOW DIFFERENT EX MANIFOLDS ,CAM, AND MAYBE THE HEADS, MINE ARE #62, ALSO I BELIEVE IT HAS 4 BOLT MAINS, NOT SURE IF MINE DOES PROBLEY NOT. AND LETS NOT FORGET THE RAM AIR SYSTEM, ITS ON MY DREAM LIST, THANKS AGAIN , DO YOU OR ANYBODY THAT MAY READ THIS KNOW OF A PONTIAC CAR CLUB ON VANCOUVER ISLAND. IF I GAVE YOU MY COWL TAG #, COULD YOU HELP DECODE IT , I KNOW PARTS OF IT .CHEERS

pontorquer · Poncho Master!

Welcome Darrell,

Nice GTO ! 1970 GTO RAM AIR III 400's were coded WS 4 speed and YZ Auto and were 4bolt mains. I miss the Island, I lived in Comox 1996-2003, maybe someday I will retire there who knows ???

PMD-242 · Member

HI, THANKS FOR REPLY, IM AWARE OF ALL ENGINE CODES, BUT BESIDES THE PARTS WICH I COULD JUST AD ON LIKE RAM AIR 3 EXHAUST MANIFOLDS, PROPER CAM,RAM AIR SYSTEM, I DONT THINK THE CARB WOULD BE MUCH DIFFERENT,OR INTAKE, AND I HAVE 9790071 WHICH IS A 69, HEADS ARE #62 ,DATE C269 OR 69 SAY, I DO BELIEVE THEY WHERE USED ON A 69 RAM AIR 3 , BUT I DONT BELIEVE MY YS BLOCK HAS 4 BOLT MAINS, AND RAM AIR DOES RIGHT, SO BASICALLY IF I ADDED ALL THOSE PARTS , BESIDES 4 BOLT MAINS I COULD MAKE IT THAT CLOSE TO A RAM AIR 3 , YES /NO MAYBE WHAT DO YOU THINK . THATS MY PLAN AND IM STICKEN TO IT . AT LEAST MY JUDGE CLONE WILL BE A REAL GTO, I GOT A SPOILER, GOT IT FOR 50$ IT HAD SOME HEAT DAMAGE FROM A HOUSE FIRE , STILL ALL THERE THOUGH , FIXABLE, THANKS , PONTIACS RULE....., HEY YOU LIVE IN MANITOBA , I USED TO LIVE NEAR WINTERPEG, GOT SNOW WE GOT LOTS OF RAIN, CHEERS

dcneric · Poncho Master!

The casting date codes on an engine are usually with in a couple weeks of each other and preceed the build of the car by as much as 3 months. I have heard speculation that Oshawa built goats may even be 6 months. I personally have never seen any documentation showing such thou. When I had my 70 Oshawa built goat the heads, intake and manifolds were cast with in 2 weeks and 3 months prior to the build date. The block was long gone.

On the face of the block near where the YS is stamped will be 6 numbers. These should match the last 6 digits of your vin as seen through the windshield.

My understanding is that the casting was the same for the 69/70 RA III heads vs standard 350hp motors only to have different ID numbers. I will stand corrected barring different info.

Post the info off your trim tag and it can be decoded.

PMD-242 · Member

OK WILL GET ALL INFO, PLUS PIC, WILL POST TOMMORROW, THANKS

PMD-242 · Member

HI THANKS FOR REPLY, MY GTO WAS BUILT IN OShawa, here are some # intake d019, heads c259 and c269, block ys-0631766, on cowl is st 70 24237-os604907 , the os604907 i cant figure out, then 258-14-b, then r- 11d, - co8d55c50m40. i have some of it figured out, the r- 11d cant figure, and first part of co8d55c50m40, this is what i do know, 70 gto , silver bottom,black vivyl top, black interior, , 11d =11 month 4th week, then co dont know , 8d= 4th week aug 69, 55= console, c50= rear defoger, m40=turbo 400 trans, their is a (pn) just below the (bdy) sign, dont know what (pn) means , pontiac maybe, thanks for your help, to all that replied, great site. i made a mistake on the 11d got that ,its the (r)i dont know, this is info i found online. I FOR GOT HEAD#, THEY ARE #62

-- Edited by PMD-242 on Wednesday 14th of November 2012 02:43:35 PM

-- Edited by PMD-242 on Wednesday 14th of November 2012 04:43:36 PM

dualquadpete · Canadian Poncho Superstar!

Eric's right on the time line of engine build to assembly line. My 64 catalina was built in Mar. 64 & engine date is mid Jan.64 assembled in Pontiac Michigan. PHS will give [sell] you their history pkg & build sheet, but I don't think it's going to give you any engine #'s just the size & HP trans. etc. They only do US built Poncho's!!! Was your "goat" built in US??? Pete

pontorquer · Poncho Master!

For some reason Pontiac didn't put 4 bolt mains on there RAM AIR III engines in 1969 but did in 1970, heads should be 48 for 1969 and 12 for 1970 respectively.

dcneric · Poncho Master!

Your trim tag looks like this?
ST 70 24237 OS 604907 BDY
TR 258 14 B PNT
11D
C08 D55 C50 M40

70 1970
24237 GTO coupe
OS Oshawa build plant
604907 Sequential Fisher body number, absolutely nothing to do with the vin
258 Black interior
14 B - Palladium Silver with Black Roof
11D November, 4th week
C08 Cordova Top
D55 Console
C50 Rear Defoger
M40 Automatic Transmission

Most of this you decoded already, but I think this covers off the questions you had regarding the trim tag.

PMD-242 · Member

THANKS AGAIN, SO (604907) IS NOT THE # FOR YOUR CARS ORDER IN WHICH IT WAS MADE, SO IS THAT # ON THE VIN, I KNOW WHAT MOST OF THAT MEANS , EXCEPT THE LAST 5 #S, SO WOULD THE LAST 5#S ON VIN BE THE ORDER IN WHICH IT WAS MADE, CHEERS

dcneric · Poncho Master!

Darrel,

That's correct.

Keep us posted on the progress.

Evil Stu · Member

PMD242,

I have an Oshawa 70 GTO, sold new at Empress Pontiac in Victoria. I bought it when I was in the Navy out there. Silver and black looks awesome. Don't let anybody keep you from putting the viny top back on, they really make the car stand out.

Stu

PMD-242 · Member

THANKS FOR REPLY, LOVE YOUR CAR , CANT WAIT TILL MINE LOOKS THAT GOOD, GOT QUESTION WOULD YOU HAPPEN TO KNOW HOW MANY CARS WHERE MADE LIKE MINE, SILVER WITH BLACK VINAL TOP AND BLACK INTERIOR, ITS NOT A JUDGE, OR DO YOU KNOW WHERE I COULD FIND OUT, IS YOUR GTO A JUDGE, MY CAR HAS A YE 400 9790071 BLOCK 1969, IT IS DATE STAMPED MARCH 1969,# 62 HEADS , TURBO 400 TRANS, 355 REAR END, SOME PEOPLE ON HERE SAY IT IS NOT ORIGINAL ENGINE , MADE TO EARLY FOR 1970, ON DOOR IT SAYS 11/69, WHAT DO YOU THINK ,IT DOES MAKE ME SAD ,BUT AT SAME TIME I DONT THINK IT COULD HAVE BEEN REPLACIED WITH A BETTER MOTOR BESIDES THE RAM AIRS, SO THAT OK. WHAT DO YOU HAVE FOR MOTOR ETC , THANKS FOR VAN ISLAND

73SC · A Poncho Legend!

Can I interest you in a nice Quadrajet # 7029268 - This is a rebuilt and restored 1969 Pontiac 400/428 carb and given your casting and build dates would work out perfectly - special CP pricing $350 plus shipping.

PMD-242 · Member

THANKS FOR OFFER BUT I JUST BOUGHT ONE LAST MONTH FOR 317 PLUS MY OLD LEAKING ONE , MY NEW CARB # IS 48878 G3, I KNOW IT IS NOT #S MATCHING BUT I TOOK ME 2 YEARS TO FIND , THOUGHT I HAD 1970 ENGINE BUT TURNED OUT TO BE 1969, WOULD YOU BE ABLE TO TELL ME WHAT IT WAS ON , IT LOOKS THE SAME AS ONE I HAD , THANKS

73SC · A Poncho Legend!

That carb I show is the one that would have been on the engine if it is a 69.

If it is a 70 then likely #7040263/4 manual/auto.

These vintage Quadrajets all appear the same with very minor internal diffrences. A lot of Pontiac guys use the Buick Quadrajets #7042240, 7043240, 7044240 because they look almost identical to a Pontiac style Quadrajet BUT flow at 800 cfm. You can find these on salvage yard Buisks with 455, Electras, Rivieras, LeSabres from 1972-74.

PMD-242 · Member

SO DOES THAT MEAN THAT THE CARB I HAVE NOW IS OFF A 69 GTO , OR IS IT SOMETHING ELSE .THANKS AGAIN