Aluminum heads or not to aluminum heads on 340
#465222
09/10/09 08:12 PM
09/10/09 08:12 PM
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Joined: Oct 2005
Posts: 337
Missouri
Confusedcuda
OP
enthusiast
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OP
enthusiast
Joined: Oct 2005
Posts: 337
Missouri
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Hello, Just want your opinions. I have a 71 340 with J-heads, that has about 5000 or 6000 miles, since rebuild, on it. It has ran good all season long, but I want little more ummpph! would be nice. I have ran into a friend of a friend, who may want to sell their Eddie Alum. heads that have never been used at a really good price. So good I almost can't pass up. Do you guys think it would be worth it to make a swap this winter in the off season to get a little more HP. My 340 has TRW forged pistons, that if my J-heads have around 68cc-71cc comb.chamb. I am looking at about 9:3:1 or 9:4:1 comp. ratio. with the eddie heads I would be at 10 or more comp.ratio, plus the other advantages. In saying, I do believe in "if it isn't broke" theory and I drove my current set on 100 mile trips when ever I can. If I was to buy these and sell my J-heads, then this conversion would cost me around 600.00 for alumin. heads. What do you think? Thanks
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Re: Aluminum heads or not to aluminum heads on 340
[Re: Confusedcuda]
#465228
09/11/09 03:49 AM
09/11/09 03:49 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: Aluminum heads or not to aluminum heads on 340
[Re: Confusedcuda]
#465231
09/11/09 10:01 AM
09/11/09 10:01 AM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
When I had my heads off, I think my pistons were flat. I am pretty sure of that. I also think they had some reliefs and they were still short of coming out of the deck, so I think they will be okay with valve clearance. I alao seen something on the eddie ads, about adjustable valvetrain needed. Is this the case with the eddie heads? How hard and expensive would this conversion be, if needed? Thanks
many here have used stock rockers without issue on them.
if your pistons are less than .015" out of the hole, you're fine with the closed chambered eddies, depending on your head gasket choice.
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Re: Aluminum heads or not to aluminum heads on 340
[Re: Confusedcuda]
#465233
09/11/09 11:57 AM
09/11/09 11:57 AM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Quote:
Hello, Just want your opinions. I have a 71 340 with J-heads, that has about 5000 or 6000 miles, since rebuild, on it. It has ran good all season long, but I want little more ummpph! would be nice. I have ran into a friend of a friend, who may want to sell their Eddie Alum. heads that have never been used at a really good price. So good I almost can't pass up. Do you guys think it would be worth it to make a swap this winter in the off season to get a little more HP. My 340 has TRW forged pistons, that if my J-heads have around 68cc-71cc comb.chamb. I am looking at about 9:3:1 or 9:4:1 comp. ratio. with the eddie heads I would be at 10 or more comp.ratio, plus the other advantages. In saying, I do believe in "if it isn't broke" theory and I drove my current set on 100 mile trips when ever I can. If I was to buy these and sell my J-heads, then this conversion would cost me around 600.00 for alumin. heads. What do you think? Thanks
I think I'd like to have the guys phone number, just in case you don't buy them  . Even $600 each is a good deal if they are new. BTW, you can make those J heads flow as well as the Edelbrocks ( out of the box ) with some mild port work and 2.02 stainless valves.
Fastest 300
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Re: Aluminum heads or not to aluminum heads on 340
[Re: Confusedcuda]
#465235
09/11/09 03:16 PM
09/11/09 03:16 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
340srule, what issues did you have that had to be corrected? So most of the time you can't just take out of box and throw them on? So there is no way the 63 cc heads will work on a 71 340?
Out of the box they weren't a true 65cc that was corrected and i had a mild port/polish job done on them,i;ve been very happy with the results using these heads on both my 416 and 360.. 
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Re: Aluminum heads or not to aluminum heads on 340
[Re: Confusedcuda]
#465237
09/11/09 03:55 PM
09/11/09 03:55 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
That's a little worry some
Whys that??..your getting the heads for less then half the cost mine were out of the box,and if i were you i'd have them checked over before installing them anyways,just to be sure everything is ok, i usually don't trust anything out of the box,and just paying to have them checked out is great piece of mind...
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