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Old 06-20-2007, 04:46 PM   #1
grabiel
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250 c.i.d.

When were 250 cu.in used in chevys, I recently bought one to put in a 54. The guy said that it came out of a 1983 van. How can I tell and why do some have 16 bolts in oil pan and some 24? what's the difference.
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Old 06-20-2007, 04:52 PM   #2
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Re: 250 c.i.d.

1966-1984 when the Vortec 4.3L V6 replaced it.
I would have to check on the pan bolts as I don't know.
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Old 06-20-2007, 06:46 PM   #3
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Re: 250 c.i.d.

Some of the later 250's had an integrated head where the head and the intake were one unit, I believe. Is yours like that?
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Old 06-24-2007, 06:09 AM   #4
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Re: 250 c.i.d.

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Originally Posted by jchav62 View Post
Some of the later 250's had an integrated head where the head and the intake were one unit, I believe. Is yours like that?
My L6 250 is like that,, makes it kinda hard to do bolt on's. like a header.
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Old 06-21-2007, 05:33 PM   #5
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Re: 250 c.i.d.

what year did the intergrated heads start?
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Old 06-21-2007, 06:15 PM   #6
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Re: 250 c.i.d.

Integrated head started in 1975.
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Old 06-26-2007, 01:44 PM   #7
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Re: 250 c.i.d.

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Originally Posted by Captkaos View Post
Integrated head started in 1975.
I thougt they started in 77, my 76 C20 with 30K original miles (even had the original bias ply tires) has separate head and exhaust.
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Old 06-26-2007, 01:57 PM   #8
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Re: 250 c.i.d.

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I thougt they started in 77, my 76 C20 with 30K original miles (even had the original bias ply tires) has separate head and exhaust.
Yours would be a 292 inline 6 if it is original. 250's were only available on the 1/2T.
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Old 06-26-2007, 02:06 PM   #9
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Re: 250 c.i.d.

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Yours would be a 292 inline 6 if it is original. 250's were only available on the 1/2T.
I thought they put the 292's in the 1/2 T's too, called em a heavy duty?...if not sorry my bad...
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Old 06-26-2007, 09:23 PM   #10
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Re: 250 c.i.d.

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I thought they put the 292's in the 1/2 T's too, called em a heavy duty?...if not sorry my bad...
You are correct, you could get a 292 in a C10 1/2T, but you couldn't get a 250 in a C20 3/4T and up...

He is asking about the 250cid. 292's never came with integrated heads.
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