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Old 12-13-2013, 04:23 PM   #1
monte0185
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454 heads

Anyone have any idea what heads come on a stock 86 454 in a C30? Mainly just square or oval port is what im curious about. was thinking of ordering a new intake.
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Old 12-13-2013, 04:40 PM   #2
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Re: 454 heads

Oval port
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Old 12-13-2013, 04:53 PM   #3
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Re: 454 heads

Cool thanks. Kinda thought they might be but its been awhile since i drug out my mortec saved web pages.
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Old 12-13-2013, 07:23 PM   #4
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Re: 454 heads

Peanut port, though an oval intake, I've read, will work.
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Old 12-13-2013, 09:15 PM   #5
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Re: 454 heads

Quote:
Originally Posted by monte0185 View Post
Anyone have any idea what heads come on a stock 86 454 in a C30? Mainly just square or oval port is what im curious about. was thinking of ordering a new intake.
Square (intake) ports only came on the special HP motors in cars....never in a truck(except El Camino)

Oval ports until mid 70's....then small oval(peanut) ports
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Old 12-13-2013, 11:22 PM   #6
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Re: 454 heads

my truck is an 83 and it has 049 large ovals, i dont think peanuts started until 85 or 86
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Old 12-13-2013, 11:43 PM   #7
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Re: 454 heads

Sounds like i need to find an excuse to put on a different set of valve covers so I can get the casting numbers. Lol
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Old 12-14-2013, 01:55 AM   #8
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Re: 454 heads

mid 80's to 1990 "Peanut" ports

http://www.mortec.com/bbc.htm

However mismatched manifolds work well with the smaller ports..

http://www.carcraft.com/techarticles...d/viewall.html
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Old 12-14-2013, 10:16 AM   #9
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Re: 454 heads

Oh hey mortec put the site back up. I did not know that!! Cool.
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Old 12-21-2013, 01:07 PM   #10
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Re: 454 heads

I thought this was a quite informative article on big block heads.


http://www.cartechbooks.com/techtips...bigblockchevy/
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Old 12-22-2013, 01:23 PM   #11
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Re: 454 heads

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Originally Posted by oldwagon View Post
I thought this was a quite informative article on big block heads.


http://www.cartechbooks.com/techtips...bigblockchevy/
Very informative and a great read!! Thanks!!
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