Aluminum 340 heads

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    Author Topic: Aluminum 340 heads  (Read 4750 times)

    Offline cuda

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    • 1970 340 Cuda, pistol grip 4 speed,3:91 sure grip
    Aluminum 340 heads
    « on: October 15, 2005 - 10:07:18 AM »
    Im looking at maybe doing my heads over the long Canadian winter here. Has anyone put on aluminum heads as aposed to cast heads? I understand the weight difference, but was interested in H.P. gain with aluminum. What type have u used, anyone tryed the 340 hemi heads? Thanks
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    Offline wart1de

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      • Vivah
    Re: Aluminum 340 heads
    « Reply #1 on: October 16, 2005 - 08:46:35 PM »
    Quote from: cuda on October 15, 2005 - 10:07:18 AM
    What type have u used, anyone tryed the 340 hemi heads? Thanks

    340 Hemi heads??  8)
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    1973 Plymouth 'Cuda
    1980 Ford Falcon XD ESP
    2012 Jeep Wrangler Rubicon

    Offline matt63

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    Re: Aluminum 340 heads
    « Reply #2 on: October 16, 2005 - 09:30:45 PM »
    I just bought Edelbrock Magnum small block heads for my 360 (LA block).  The conversion is easy if you plan on changing out the whole valve train.  The heads are lighter and they flow around 240-250 at 0.500 out of the box.  We'll see how she runs in the spring (its a 408 stroker)
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    Matt in Edmonton

    '68 Valiant
    '73 Cuda 340 4 speed (408) SOLD

    Offline T/A Karl

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    Re: Aluminum 340 heads
    « Reply #3 on: November 09, 2005 - 08:52:59 AM »
    I've got Eddy heads on my T/A and a Crane roller rocker set up.  The power is great and there's an approximate 60lbs weight reduction but the engine does tend to sound a little tinny.
    « Last Edit: November 09, 2005 - 01:13:32 PM by 4cruzin »
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    chargin

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    Re: Aluminum 340 heads
    « Reply #4 on: November 09, 2005 - 10:49:00 AM »
    very awesome car T/AKarl........ i'd love to see some engine pics as well! 
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    Offline matt63

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    Re: Aluminum 340 heads
    « Reply #5 on: November 09, 2005 - 06:29:07 PM »
    Quote from: T/A Karl on November 09, 2005 - 08:52:59 AM
    I've got Eddy heads on my T/A and a Crane roller rocker set up.  The power is great and there's an approximate 60lbs weight reduction but the engine does tend to sound a little tinny.

    What do you have for an exhaust system?
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    Matt in Edmonton

    '68 Valiant
    '73 Cuda 340 4 speed (408) SOLD

    Offline Chryco Psycho

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    Re: Aluminum 340 heads
    « Reply #6 on: November 09, 2005 - 08:49:07 PM »
    I typically get a 41 hp gain swapping on juckyard 308 truck heads , great bang for the $$
     the eddys I looked at were not as well designed as the 308 heads & had bad core shift
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    Offline ACE_5150

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    Re: Aluminum 340 heads
    « Reply #7 on: November 09, 2005 - 10:55:29 PM »
    Quote from: Chryco Psycho on November 09, 2005 - 08:49:07 PM
    I typically get a 41 hp gain swapping on juckyard 308 truck heads , great bang for the $$
     the eddys I looked at were not as well designed as the 308 heads & had bad core shift

    Can someone please fill me in on what 308 and Eddy heads are? I am birddogging Matt63 on his 408 buildup, as I am awaitng the funds for my 412/ 360 build. Aluminum heads are definitely going on it . My challenger is on a strict Weightwatchers diet this winter.
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    Offline Chryco Psycho

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    Re: Aluminum 340 heads
    « Reply #8 on: November 10, 2005 - 01:52:06 AM »
    308 are the last LA heads avaialable on the 360 trucks from 87-92
     the Eddys are the Edelbrock alum heads , my local speed shop has found a lot of the eddy heads to be poorly cast but not all will have bad core shift ... I hope 
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    Offline matt63

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    Re: Aluminum 340 heads
    « Reply #9 on: November 10, 2005 - 06:38:56 PM »
    Quote from: Chryco Psycho on November 10, 2005 - 01:52:06 AM
    308 are the last LA heads avaialable on the 360 trucks from 87-92
     the Eddys are the Edelbrock alum heads , my local speed shop has found a lot of the eddy heads to be poorly cast but not all will have bad core shift ... I hope 

    I had my Eddy's checked out, gasket matched, new springs, clean-up ,etc. and there was no problems except some poor spotfacing on a couple of the bolt bosses.  Flows were in the W2 range.
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    Matt in Edmonton

    '68 Valiant
    '73 Cuda 340 4 speed (408) SOLD

    Offline ACE_5150

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    Re: Aluminum 340 heads
    « Reply #10 on: November 11, 2005 - 08:25:55 AM »
    Quote from: Chryco Psycho on November 10, 2005 - 01:52:06 AM
    308 are the last LA heads avaialable on the 360 trucks from 87-92
     the Eddys are the Edelbrock alum heads , my local speed shop has found a lot of the eddy heads to be poorly cast but not all will have bad core shift ... I hope 

    So, on the 308 heads, would this be a good swap for a mild build up on the 412/ 408 sb stroker? Can they be worked over a little bit for a few more HP?
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    "An Adrenal Gland is a Terrible thing to waste!"
    "Bad Cop, No Donut!"

    Offline ACE_5150

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    Re: Aluminum 340 heads
    « Reply #11 on: November 11, 2005 - 04:23:40 PM »
    Also, what would be a good price on a junkyard set of these? I figure the ports will have to be opened up a little bit for the 412.
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    "An Adrenal Gland is a Terrible thing to waste!"
    "Bad Cop, No Donut!"

    Offline Chryco Psycho

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    Re: Aluminum 340 heads
    « Reply #12 on: November 13, 2005 - 01:42:35 AM »
    I pay around $50 for a pair , I would definatly port them , the 308 have smaller ports then the XorJ heads but make more power anyway
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    Offline Hot_Rodder

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    Re: Aluminum 340 heads
    « Reply #13 on: November 13, 2005 - 10:03:44 AM »
    Hey Chryco, the Bull Dog Heads, what all engines were those for? Were they just for BB, or both BB and SB?


    Also, I can't find that website anymore... Can't remember what it is, but I could usualy find it, last e-mail that I ahve about them was saying that the company shut down, but I can't remember if there was any mixed information or not, but can you remember the web addy?
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    Offline Chryco Psycho

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    Re: Aluminum 340 heads
    « Reply #14 on: November 14, 2005 - 01:10:06 AM »
    Bulldog doesn`t have a small block head  , you can buy them through  Muscle Motors in Lansing
     I wil have to look for the website
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