Old 318 with new magnum heads...yay or nay?
#1180304
02/18/12 12:29 AM
02/18/12 12:29 AM
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Joined: Mar 2005
Posts: 1,630 North Central Florida
eightlitermopar
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top fuel
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OP
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Joined: Mar 2005
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North Central Florida
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My coronet has the 318 granny motor in it. Nothing awesome, but I will be pulling it to regasket the thing (since it leaks from every possible place).
While it is out, I am afraid what I will find in regards to the 1969 castings.
Is the swap to the newer magnum heads worth it?
Should I use some iron ones I find from the local junkyard?
I will be running manifolds since it is a 4 door cruiser, but what are your experiences?
Yay or Nay? old small block heads or newer magnum castings??
Eightlitermopar
Mopar or no car
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Re: Old 318 with new magnum heads...yay or nay?
[Re: BulletBob]
#1180309
02/18/12 12:41 AM
02/18/12 12:41 AM
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Joined: Mar 2005
Posts: 1,630 North Central Florida
eightlitermopar
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I knew that a new intake would be needed. that would have sucked trying to get my old one to fit Anyway, just wondering if it delivers the difference enough to make the swap worth it. thanks! Eightlitermopar ps. Do you have to get custom pushrods? Or do you use the magnum pieces?
Mopar or no car
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Re: Old 318 with new magnum heads...yay or nay?
[Re: BulletBob]
#1180313
02/18/12 01:24 AM
02/18/12 01:24 AM
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Joined: Jan 2003
Posts: 9,887 USA
CrAlt
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USA
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Why not just keep it simple and swap on some '302 swirl port heads?
Everything you have now will bolt up. No fancy intake or manifolds needed. They are already set up for unleaded gas. And they flow better then the old 318 heads.
Look for them on a 85 or later M-body with a 2bbl or a TBI truck engine.
Magnum heads are better but if you are keeping the motor stockish i dont think they are worth all the extra crap you have to do to make them fit.
I was asked to contribute money to help solve the civil unrest in Egypt, but I suspect it's some sort of pyramid scheme.
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Re: Old 318 with new magnum heads...yay or nay?
[Re: CrAlt]
#1180315
02/18/12 04:45 AM
02/18/12 04:45 AM
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Joined: Oct 2005
Posts: 6,048 Back home in PA
BulletBob
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Back home in PA
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Quote:
Why not just keep it simple and swap on some '302 swirl port heads?
Everything you have now will bolt up. No fancy intake or manifolds needed. They are already set up for unleaded gas. And they flow better then the old 318 heads.
Look for them on a 85 or later M-body with a 2bbl or a TBI truck engine.
Magnum heads are better but if you are keeping the motor stockish i dont think they are worth all the extra crap you have to do to make them fit.
His stock exhaust manifolds will bolt to them
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Re: Old 318 with new magnum heads...yay or nay?
[Re: 340SHORTY]
#1180319
02/18/12 09:39 AM
02/18/12 09:39 AM
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Joined: Jan 2003
Posts: 8,028 The Grand State of Confusion-O...
SKR8PN
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The Grand State of Confusion-O...
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If your going that far with the engine regasket,(new heads and intake and pushrods and lifters) you might as well re-ring it,re-bearing it and cam it while your in there. "IF" the bores are OK and within specs that is.....
Karma has no menu. You get served what you deserve.
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Re: Old 318 with new magnum heads...yay or nay?
[Re: 340SHORTY]
#1180323
02/18/12 12:11 PM
02/18/12 12:11 PM
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Joined: Oct 2005
Posts: 6,048 Back home in PA
BulletBob
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Quote:
and a 400.== intake manifold [/quot
That intake in the pic is $180..00 new shipped to the door, The Performer RPM Air-Gap is $295.00 new
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