074 Heads
 

I have a nice set of 3946074 heads dated 11/30/73. So I guess that makes them parts counter items ?
Was curious to what these are going for should I want to sell them or list them on Ebay ?
There is what looks to be a repair to plug a hole.
Look at the picture below, there is a small stud or bolt ground flush, with a washer around it,and there is some silicon around the washer, any ideas why there was a hole here ?. On both heads in the same place.


http://i18.photobucket.com/albums/b1...40Heads003.jpg


http://i18.photobucket.com/albums/b1...40Heads002.jpg

Also both heads stamped "EVERHART" on the ends. Is this just someones way of ID'ing the heads ? Or was this a race team ?


http://i18.photobucket.com/albums/b1...40Heads005.jpg


http://i18.photobucket.com/albums/b1...40Heads004.jpg

The stud holes for what I understand to be for a ZL1 application have been pluged.


http://i18.photobucket.com/albums/b1...40Heads006.jpg

Thanks for any insight, Mike https://www.yenko.net/ubbthreads/imag...ouguysrock.gif

Re: 074 Heads
 

[ QUOTE ]
any ideas why there was a hole here

[/ QUOTE ] Those are the equivalent to turkey poppers that stick out when the turkey reaches temperature . They are put on by rebuilders so when you bring them in they can tell if the heads were over heated,if you try to remove them the warranty is void.

Re: 074 Heads
 

[ QUOTE ]
[ QUOTE ]
any ideas why there was a hole here

[/ QUOTE ] Those are the equivalent to turkey poppers that stick out when the turkey reaches temperature . They are put on by rebuilders so when you bring them in they can tell if the heads were over heated,if you try to remove them the warranty is void.

[/ QUOTE ]

Chuck!

What's the vintage of these poppers? I've never seen or
heard of them being used before. As a matter of fact, of
the billions-and-billions of BBC aluminum heads I've seen
on the bay, these are the first I've ever seen. What else
can you tell me about their use and how effective they
really were? What was the timeframe such a device would
have been used? Inquiring minds want to know..... https://www.yenko.net/ubbthreads/imag...ns/naughty.gif

Steve

Re: 074 Heads
 

They are used by some rebuilders. If you come back with the heads/ motor and they were tampered with,removed, or "popped out" due to overheating the shop wont stand behind them. Thats basically what thier function is.

Re: 074 Heads
 

427 King, thanks, https://www.yenko.net/ubbthreads/imag...lins/beers.gif never heard of such a thing. Sure would like to see one B4 installation.
Are these guys worth anything with the 1973 dates ??

Mike

Re: 074 Heads
 

Actually Mike, I have a somewhat associated question.

We all know that these heads are all over ePay because of
their ZL-1 & L-88 heritige. However, I have read numerous
books about building hot rat motors from back in the day and
all of them pretty much trashed these heads for their round
exhaust port configurations and lack of power unless you ran
open headers and super combustion.... How accurate is this?
If true, what explains the crazy prices for '074 heads and
why aren't the '077 heads worth a boat-load more?

Nuch

Re: 074 Heads
 

[ QUOTE ]
I have read numerous
books about building hot rat motors from back in the day and
all of them pretty much trashed these heads for their round
exhaust port configurations and lack of power unless you ran
open headers and super combustion.... How accurate is this?
If true, what explains the crazy prices for '074 heads and
why aren't the '077 heads worth a boat-load more?

[/ QUOTE ] Its simple, appearance when the hood is open. The same reason a vintage ZL1 is worth 3 times a yenko ZL1 or a new GM zl1.

Re: 074 Heads
 

Chuck,

Where a real ZL-1 or L-88 ( one of the 2 - 4 ) are concerned,
I totally agree. However, there are tons of these heads
available from parts counter sales back in the day and all
the remaining ZL-1 wanna-be cars really shouldn't care about
the '074 heads as long as they are aluminum.

So I'm still wondering why the '074 heads are worth so much?

Nuch

Re: 074 Heads
 

[ QUOTE ]
So I'm still wondering why the '074 heads are worth so much?


[/ QUOTE ] All 4 casting numbers[392,842,074,077]had thier own external appearances. Why are 67 heads going for tons of money when only 20 L88s were made?? People want cars vintage correct,and appearance correct over performance .