What engine is this?

[markreed]

Just bought a "new" truck. '64 GMC 1000 series.

I have been looking over the engine, and I cannot seem to figure out what it is. I am relatively new to older modeled engines. My first thoughts were that is was a 350, ive been told that is the easiest swap to make. Also the intake manifold is a "Performer 350 Olds." Some sort of edlebrock carb.

That being said, the oil fill tube looks more like one that would be on a 327. I also don't know if the valve cover bolts are normally offset on a 350?

Anywho, here is a low quality picture. I can take different views or whatever may help.

[joedoh]

olds 260 or variant.


edit: the edelbrock page says it will fit olds 307/350/403, judging by the air cleaner its probably a 307 olds. my 79 cutlass had a 260 that looked exactly the same and I dont know why the edlebrock intake wouldnt fit a 260 but maybe it doesnt.

[Captainfab]

Basically your truck has an Oldsmobile engine and trans in it. As for determining exactly what size it is, I do not know. I'm sure someone that does will chime in.

[Rich 5150 69]

You may try here, there are several sites dedicated to olds..
http://www.442.com/oldsfaq/ofblk.htm

[koda360]

That huge intake is screamin OLDS...

[1Bad62Pro/Street]

Quick Identification

The large oil fill tube on the front of the engine, sticking up from the timing chain area, is a dead giveaway that it is an Olds engine. The distributor is found at the back of the block and it does not go through the intake manifold, but right into the block. Also the spark plugs will be above the exhaust manifolds with no need for heat shields. Early pre-68 oil fill tubes had a simple smooth tubular top with a press-on oil fill cap. Late 68-up oil fill tubes have a twist-on cap with correspondingly enhanced tube shape, and an engine unit number stamped into the tube, the first digit of which matches the last digit of the year in which that engine hit the streets well, model year, you know.

YearOne www.yearone.com/ had the best info and tech articles on this stuff, but they recently changed their website and many links have changed or deleted. But some are now re-located here http://www.drivinithome.com/#
under Tech Talk > Vehicle Info and Decoding.

For more info on Oldsmobile Engine Identification click on the links below:

http://oldsjunction.classicoldsmobil...sfaq/ofeng.htm

http://www.442.com/oldsfaq/ofeng.htm

http://www.442.com/oldsfaq/ofblk.htm

http://www.442.com/oldsfaq/ofhed.htm

http://classicoldsmobile.com/forums/...s-engines.html

http://67-72chevytrucks.com/vboard/s...d.php?t=382583

[markreed]

Thanks for the responses! I will pull the numbers and see what I can find out.

[62 Longbed]

Take a look at the L/F stamping on the head ... Numbers = small block ... Letter = Big Block ... But since it has a Performer 350 intake its a small block .. Number on Head should tell you size and year ..



ID/ Use Casting
Code Year(s) CID CCs Number Notes


1 ( '64 330 385101 Used ROCKER SHAFTS rather than
pairs on PEDESTALS.

2 ('65 330 ?????? All V-8s now using PEDESTALS.

3 ('66 330 60 389394

4 ('67 330 60 394497

5 ('68 - '69 350 64 397742 Excellent candidate for use today.
Good flowing, and high compression.

6 ('70 350 64 403859 W-31's had larger 2.000 intakes. '69
W-31's?

7 ('71 350 64 409147 W-31's had larger [2.000] valves.

7A ('72 350 64 409147 The 'A' is a subscript, like ¼"
tall, to lower right of the '7',
like | 7A.

8 ('73 - '76 350 79 411929 Smog heads. Have huge bb-sized 79cc
chambers yielding poor compression
ratios without extremes of
compensation.

10 ('76, '77? 260? 57 550362

2A ('76 - '81 260 554715 Easy way to ID a 260 engine.

3A ('77 - '80 350 75 554716 1/2" bolt holes.

4A ('77 - '79 403 83 554717 Matches the 4A or 4B block, get it?
Easy way to ID a 403. 1/2" bolt holes.

5A ('80 - '84 307 64 3317
'85 also???

6A ('85 - ?? 307 67 5844 Non-ECM Canadian cars?

7A ('85 - '90 307 67 0142 This 'A', and the others from 2A to
6A, is a large capital letter equal
in size to, and immediately adjacent
to the 7, like | 7A.

D3A ( 350 3948 Diesel.



My 2 cents ....

[markreed]

Originally Posted by 62 Longbed

Take a look at the L/F stamping on the head ... Numbers = small block ... Letter = Big Block ... But since it has a Performer 350 intake its a small block .. Number on Head should tell you size and year ..



ID/ Use Casting
Code Year(s) CID CCs Number Notes


1 ( '64 330 385101 Used ROCKER SHAFTS rather than
pairs on PEDESTALS.

2 ('65 330 ?????? All V-8s now using PEDESTALS.

3 ('66 330 60 389394

4 ('67 330 60 394497

5 ('68 - '69 350 64 397742 Excellent candidate for use today.
Good flowing, and high compression.

6 ('70 350 64 403859 W-31's had larger 2.000 intakes. '69
W-31's?

7 ('71 350 64 409147 W-31's had larger [2.000] valves.

7A ('72 350 64 409147 The 'A' is a subscript, like ¼"
tall, to lower right of the '7',
like | 7A.

8 ('73 - '76 350 79 411929 Smog heads. Have huge bb-sized 79cc
chambers yielding poor compression
ratios without extremes of
compensation.

10 ('76, '77? 260? 57 550362

2A ('76 - '81 260 554715 Easy way to ID a 260 engine.

3A ('77 - '80 350 75 554716 1/2" bolt holes.

4A ('77 - '79 403 83 554717 Matches the 4A or 4B block, get it?
Easy way to ID a 403. 1/2" bolt holes.

5A ('80 - '84 307 64 3317
'85 also???

6A ('85 - ?? 307 67 5844 Non-ECM Canadian cars?

7A ('85 - '90 307 67 0142 This 'A', and the others from 2A to
6A, is a large capital letter equal
in size to, and immediately adjacent
to the 7, like | 7A.

D3A ( 350 3948 Diesel.



My 2 cents ....

Thanks for the help. ID is 6 (1970) 403859, but I don't believe its the W-31

[txinliner]

Originally Posted by markreed

Just bought a "new" truck. '64 GMC 1000 series.

I have been looking over the engine, and I cannot seem to figure out what it is. I am relatively new to older modeled engines. My first thoughts were that is was a 350, ive been told that is the easiest swap to make. Also the intake manifold is a "Performer 350 Olds." Some sort of edlebrock carb.

That being said, the oil fill tube looks more like one that would be on a 327. I also don't know if the valve cover bolts are normally offset on a 350?

Anywho, here is a low quality picture. I can take different views or whatever may help.

olds y block