Hey guys, so this weekend i started working on my 67 Acadian. The tear down begun. Anyway when i purchased the car i was told it had a 327 chevy small block in it. To me it looked like one but wasn't sure. So when i looked at the casting number i found 3959512 for the casting number does anyone know what year and what i was out of let me know. Is it a good 327 block or not. Cheers guys.
you will most likely have a warranty replacement block. Check the front pad to see if the number starts with a CE . This could be a 302, 327 or 350. Have to take some measurements of the guts inside.
-- Edited by 70 SS ACADIAN on Sunday 18th of September 2011 05:19:18 AM
Do you have it torn right down? Is it a small journal or large journal crankshaft? The casting number off the crank will tell if it's a 327 or 350. Also, is there a date code on the block? It will be on the opposite side to the casting number.
It has a spin on oil filter I assume?
As Kevin said, it's likely a replacement block. I've read about them but don't think I've ever seen one with that casting number.
As far as it being good or not, I'm sure as long as it was a running engine with no damage it will be fine for what you are doing.
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
62-63 327 250 hp http://www.nastyz28.com/sbchevy/sblock.php One thing I am aware of with these early blocks is the clutch linkage mounts in a different location on the block than the later ones so if you are looking to put a 4 speed in it I would keep this in mind. What heads are on it? If they are the ones with a little "witches hat" casting mark on the end they are likly original to the engine.
To answer your question about the engine. Yes it is a nice little 327 assuming it's not going to need much work. Is is standard bore? I would be looking at different heads if it has the original heads on it. The "camel hump" heads were far better and are fairly cheep.
Hey guys, so this weekend i started working on my 67 Acadian. The tear down begun. Anyway when i purchased the car i was told it had a 327 chevy small block in it. To me it looked like one but wasn't sure. So when i looked at the casting number i found 3959512 for the casting number does anyone know what year and what i was out of let me know. Is it a good 327 block or not. Cheers guys.
quote from Internet
SBC 327 Block casting number 3959512
The casting number is for a 62-67 327. The block was a special thick wall casting that went out to to select racers in the 60's. I used it in C/SM in the late 70's.
off topic here is a picture of a cheeta my brother-inlaw had in the late 60's he drove it around Penticton remember hitting almost 200 mph between penticton and summerland before the curves were taken out.. like riding on a skate board with a rocket attached.
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Surrey BC
1963 Acadian Beaumont Sport Deluxe http://www.63acadian.com/
cool pix lefty i thought a 39 block was a big journal crank 38 was small and all small journal 327s have a steel crank,big j 327s began in 68? this is confusing
Large journal small blocks didn't happen until the 1968 models, with one exception: the 1967 350 which at that time was only found in the Camaro SS.
Small journal 327s used forged steel cranks. When the large journals made their appearance, cast cranks became the norm. Exceptions were high performance 327s OVER 300 horses, in other words the 325 & 350 horse versions (really one and the same engine)
For 1967 the 302 Z28 engines had small journals, 2-bolt mains and forged cranks; for 1968 large journals, forged steel cranks & 2-bolt mains; finally in 1969 the blocks changed to 4-bolt mains. Another way of looking at it was 67 Z28s used a 327 block, 1968 Z28s used early 350 blocks, 1969 Z28s used 4-bolt main 350 blocks (essentially a crank change would make a 69 Z28 into an LT-1 350).
Prior to the factory implementation of 4-bolt mains, the aftermarket offered them for racing (I'm thinking Summers Brothers here).
As was said earlier, the bosses in the Chevy II block had relocated bosses for the clutch cross shaft mount (also relocated oil filter mount). The oil pan was exclusively a forward sump, which also obviously means a diffferent pickup location as well.
All this doesn't mention a word about casting numbers, but it can give insight and a timeline as to what was evolving in small block development.
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67 Chevelle Malibu Sport Coupe, Oshawa-built 250 PG never disturbed.
In garage, 296 cid inline six & TH350...
Cam, Toronto.
I don't judge a man by how far he's fallen, but by how far back he bounces - Patton
hey dave what were the industrial 327's like in the old massey 510 combines ? I know they had steel cranks and different heads but I can't remember if they had 4 bolt mains ??
hey dave what were the industrial 327's like in the old massey 510 combines ? I know they had steel cranks and different heads but I can't remember if they had 4 bolt mains ??
Not sure on that one Elroy. I had to replace head gaskets on a few of those. Rads would get plugged with chaff and overheat. I still get itchy even thinking about that.
