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327 Engine question?

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Old Jul 21, 2007 | 06:11 PM
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Default 327 Engine question?

I just bought a 1968 Corvette. I was told the motor was out of a
62-65 Corvette. The Block casting numbers are 3782870 and under the heads I found F0I08H0 . Can anyone tell me more about the motor? It has double hump heads. I was just wandering The horespower rating and if it is really from a c2 vette. If it is I have the original tack drive distributor is it worth anything? Anything that anyone can tell me will be appreaciated. Thanks!
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Old Jul 21, 2007 | 06:19 PM
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Your engine was assembled on January 8, 1965 in Flint Michigan. Suffix HO on an 870 block is 1965 only, 327/250HP with powerglide, and is a Corvette only engine---not used in any other body style. I got this info from this website, just in case anyone is interested.

http://www.nastyz28.com/chevy-engine-code-stampings.php


RON

Last edited by rongold; Jul 21, 2007 at 06:44 PM.
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Old Jul 21, 2007 | 06:23 PM
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When you say 'under the heads' are you talking about the 'pad' that is on the engine block/passenger side right at the deck surface? If so, then there's a good possibility that the HO stands for 327/250 horse base engine with the WCFB carb and a powerglide (from the NCRS Corvette Spec Guide). There will be a date code on the back of the block above the bellhousing flange and also under the valve covers. One quick way to tell if it's a 67 and earlier block is to see if there's the draft tube opening at the back alongside the distributor. There should be a cap/breather tube bolted down to it and that tube carries forward towards the carb as a way to burn the excess crankcase oily vapors and gasses.
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Old Jul 21, 2007 | 06:40 PM
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if it was really trully installed in a Corvette and the stamp pad is really untouched, you'll see a numerical sequence on that stamp pad as well, possibly starting with the number 5, such as "5114316" (that's mine, btw)
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Old Jul 21, 2007 | 10:21 PM
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Did the 250 hp come with double bump heads? I thought they came with the pyramid heads.
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Old Jul 21, 2007 | 10:33 PM
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Originally Posted by 65 vette dude
Did the 250 hp come with double bump heads? I thought they came with the pyramid heads.
Not completely sure but I think the 250 horse engines from 64-on back might have had the pyramid heads. In 65 all Corvette 327's came with the same #461 head and it should have the double bump on the end.
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Old Jul 22, 2007 | 12:02 AM
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Originally Posted by Seaside63
Somebody with an "all original" 65-396 is gonna be awful mad when you post their vin is on a 250hp block !!!
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Old Jul 22, 2007 | 12:07 AM
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Originally Posted by Seaside63
Somebody with an "all original" 65-396 is gonna be awful mad when you post their vin is on a 250hp block !!!
Oh no, that won't be a problem. This has happened several times with '67 435 hp cars. It is a case of the General preparing a economical engine for the gas crisis of the '70s for these owners, when 6 mpg became a big deal.
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Old Jul 22, 2007 | 03:13 AM
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Well it looks like I have the 65 Corvette motor 250 hp version with the 461 casting double hump heads. The car sure feels like a whole lot more than 250 hp. It does have a edlebrock high rise intake and a new hole 650 carb along with a new HEI tach drive distributor.
Can anyone tell me if the original distributor is worth anything? The guy I bought the car from said it worked fine and that he just replaced it because he was going to build the moror for racing.
Wow it looks like the 250hp version was the rarest in 65. The one time I wish i got something that wasn't rare. But it sure does feel like a lot more than 250hp.
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Old Jul 22, 2007 | 08:41 AM
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the 461 heads are like mine I bet. They are off a 65, double humpers,but only have the 194 valves. (which are decent heads,dont get me wrong)
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Old Jul 22, 2007 | 08:48 AM
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Originally Posted by C5-Lt4
Well it looks like I have the 65 Corvette motor 250 hp version with the 461 casting double hump heads. The car sure feels like a whole lot more than 250 hp. It does have a edlebrock high rise intake and a new hole 650 carb along with a new HEI tach drive distributor.
Can anyone tell me if the original distributor is worth anything? The guy I bought the car from said it worked fine and that he just replaced it because he was going to build the moror for racing.
Wow it looks like the 250hp version was the rarest in 65. The one time I wish i got something that wasn't rare. But it sure does feel like a lot more than 250hp.
No telling what's inside the motor though! especially given the mainfold and carb. The stock cam made great torque, but really flattens out as you get to 5000 rpm. If your motor likes to rev, you have a different cam..

Sorry, I cannot help on the distributor.
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Old Jul 22, 2007 | 02:04 PM
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Originally Posted by C5-Lt4
along with a new HEI tach drive distributor.
Can anyone tell me if the original distributor is worth anything? The guy I bought the car from said it worked fine and that he just replaced it because he was going to build the moror for racing.
There's nothing wrong with the original distributor, and it's worth more to someone who knows how to set them up than any HEI distributor; the HEI won't fit under the ignition shielding either.
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Old Jul 22, 2007 | 03:10 PM
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I just noticed the link in a previous post above this one by RONGOLD
That the Ho was for a 300hp 65 Corvette and that the HQ is for the
250 hp version. Can someone clear this up for me? i may be reading it wrong. My pad says F0I08H0 I didn't see any numbers in front of that.
I don't think it really matters because the car has to have a bigger cam
it goes to 6,000 RPM like it is nothing. I didn't want to go any higher but 6,000 was nothing. By the way the intake is a high rise Holley Dominator not a edlebrock intake- I was relying on my meomory(it's not that good). Thanks for all the imput!
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Old Jul 22, 2007 | 08:39 PM
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250 and 300 hp motors are both torque motors that flatten out at 5000.. your's definitely has a cam!!
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Old Jul 22, 2007 | 10:33 PM
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Originally Posted by C5-Lt4
I just noticed the link in a previous post above this one by RONGOLD
That the Ho was for a 300hp 65 Corvette and that the HQ is for the
250 hp version. Can someone clear this up for me? i may be reading it wrong. My pad says F0I08H0 I didn't see any numbers in front of that.
I don't think it really matters because the car has to have a bigger cam
it goes to 6,000 RPM like it is nothing. I didn't want to go any higher but 6,000 was nothing. By the way the intake is a high rise Holley Dominator not a edlebrock intake- I was relying on my meomory(it's not that good). Thanks for all the imput!
no VIN sequence on the pad => it wasn't born in a Corvette. That block casting number WAS used in Corvettes, true; it was also used in other 60s GM products.

I also agree that, whatever the engine assembly stamp translates to, some 40 years later much might have changed inside, for the better, for the worse, or simply for the different.
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