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  #16 (permalink)  
Old 03-10-2005, 01:23 PM
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Quote:
Originally Posted by pink63impala
also heard them be called "fuelly heads"

I believe the fuelly heads are different than the double humps-

K

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  #17 (permalink)  
Old 03-10-2005, 01:35 PM
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I know some people are still looking for them in racing. Some rule's they have that is the best head you can git. The rules will not let you run aftermarket heads. Which I think is dumb!!! Like stated before you spend more money on them, when you can buy better heads off the shelf.
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Old 03-10-2005, 01:36 PM
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heads

Around my parts we always called them double humps also, Now i just go by the number on them,186,462,461,492 etc... What made these heads popular is the fact they have a 67cc (advertised) chamber. So they will bring up the compression over the 76cc chamber heads. So years ago before the influx of all the aftermarket heads they were the deal if you needed a chamber that size....

There were alot of fast race cars with these heads on them but like the others have mentioned it's all in the porters hand....

Depending on the number and the date code some of these heads are worth a small fourtune.....

Keith
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  #19 (permalink)  
Old 03-10-2005, 01:58 PM
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Depending on what part of the country you live in, they are called "double humpers, camel backs, camel humps, fuelies", and others. Personally, I call the several sets that I have "space taker uppers" and soon I will be calling them "scrap".

tom
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Old 03-10-2005, 02:01 PM
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Quote:
Originally Posted by k-star
Around my parts we always called them double humps also, Now i just go by the number on them,186,462,461,492 etc... What made these heads popular is the fact they have a 67cc (advertised) chamber. So they will bring up the compression over the 76cc chamber heads. So years ago before the influx of all the aftermarket heads they were the deal if you needed a chamber that size....

Keith

The ones with 2.02/1.60 valves measure around 64ccs. The ones with 1.94/1.50 valves measure around 58-60ccs.

tom

Last edited by machine shop tom; 03-11-2005 at 03:14 PM.
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Old 03-10-2005, 02:45 PM
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Where can i find the date code on the double hump heads. I have a set on my 383(10:1, not sure on the cam, wieand intake, 750 dumble pumper) with roller rockers, and a port/polish job. I was planning on putting them on ebay and would like to know a little more about them before i do. Any input on what i should replace them with would also be helpful. I have looked at the darts, and like the price, but what about aluminum heads. I was told to look at AFR heads. I would like to keep price down because it is a street motor/truck. Thanks in advance.
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  #22 (permalink)  
Old 03-11-2005, 09:07 AM
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Are you asking where you can look up the date codes or where the date codes are on the heads? They are under the valve cover and it is cast in. If you list the numbers on e-bay when you go to sell them the people that are interested will let you know everything you ever wanted to know about them. I sold a set a few months ago on e-bay. There are also places online and in books you can look up the date codes. Do a search online.

As far as replacing them, the Dart Iron Eagles would probably be a good choice for your application. AFR's are not cheap and with your compression ratio you really don't need aluminum.

Royce
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Old 03-11-2005, 10:49 AM
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I was looking at www.ryanscarpage.50megs.com and liked the numbers the dart was producing for the price. Thanks for the help.
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Old 03-11-2005, 11:50 AM
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Machine Shop Tom,
"The ones with 2.02/1.60 valves measure around 64ccs. The ones with 1.84/1.50 valves measure around 58-60ccs."


Not looking to argue, but I beleive the combustion chamber was the same regardless of which valves were installed.. 2.02"/1.60" or 1.94"/1.50".

The high performance 327's( 340HP,350HP, 360HP,365HP & 375HP) came with the larger valves, but the 62-64 300HP and all 65-67 327's with a 4 barrel got the 1.94"/1.50" valves. I know there were SOME 2 barrel 327's in the later years and I don't know which heads were used on them.
Johnny

Last edited by johnnya; 03-11-2005 at 11:57 AM.
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  #25 (permalink)  
Old 03-11-2005, 03:12 PM
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Quote:
Originally Posted by johnnya
Machine Shop Tom,
"The ones with 2.02/1.60 valves measure around 64ccs. The ones with 1.84/1.50 valves measure around 58-60ccs."


Not looking to argue, but I beleive the combustion chamber was the same regardless of which valves were installed.. 2.02"/1.60" or 1.94"/1.50".

The high performance 327's( 340HP,350HP, 360HP,365HP & 375HP) came with the larger valves, but the 62-64 300HP and all 65-67 327's with a 4 barrel got the 1.94"/1.50" valves. I know there were SOME 2 barrel 327's in the later years and I don't know which heads were used on them.
Johnny
You wouldn't be arguing with me, it's my cc burette you'd have to convince. I've cc'd both styles....that's how I know for sure. The heads with 2.02/1.60 valves are relieved (unshrouded) around the valves.

tom
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  #26 (permalink)  
Old 03-11-2005, 04:18 PM
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Actually there were some differences in the double hump series of heads. The early 461s did not have the relief around the spark plug that the 462s, 291s, 186s or the 492s. The early 461s would cc around 62-64 cc but depending upon the foundry, will vary somewhat. I worked in a foundry for a couple of years and things certainly can vary. The later heads with the relief will work out around between 65 and 68 CC. Of course all of these heads are old, so you have to take into account the fact that they've probably been milled a little through the years, and the valves ground, etc which will effect the size.
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