Stock Eliminator Heads 441 question

DougM · 10-08-2016, 07:43 PM

Thanks to all that answered my question!
Regards
Doug

Alan Roehrich · 10-08-2016, 11:18 PM

Yes. Just because the casting number is the same, it does not mean the casting itself is the same. There are several known versions of the 441 head in particular.

Adger Smith · 10-09-2016, 12:01 PM

The specs that are listed in the NHRA guides may or may not be what was actually produced by the auto maker (all brands). The specs listed are the specs that NHRA Tech Department chooses to accept and publish as "NHRA's Accepted Specification". The acceptance process is usually done by what the auto maker submits to NHRA as the spec for specific engines. I believe NHRA has also altered some specs by what their Tech inspectors suggest or another long NHRA process. In short, What is published in NHRA specs may never be found in a junkyard or stack of engines. On the other hand you may find parts with the NHRA specs.

DougM · 10-09-2016, 12:21 PM

Thanks Adger and Alan. This information makes picking used heads even a bit more difficult. I will have to cc all heads as I am sure I will not be able to tell the difference between a 63 and a 74 cc chamber volume! Any tips on selecting used 441 castings?
Regards
Doug

Rich Biebel · 10-10-2016, 07:50 AM

I never saw a 441 head with anything but the large mid 70's CC chambers...

They were usually 75-76 cc's or a little larger, unmilled......

1.94-1.5 valves and there were some with 1.6 exhausts used on I believe 1970ish 400's in trucks with 3/8ths valve stems.....IIRC....

If they made a small CC version, I never saw one....

Kevin Panzino · 10-10-2016, 11:19 AM

I too have never seen one.

DougM · 10-10-2016, 02:00 PM

Thanks Rich and Kevin! I will ask the owner who is selling the entire motor if I can c.c. the heads and then I will report back if he is agreeable.
Regards
Doug

Terry Cain · 10-10-2016, 04:05 PM

I'd say that 63 cc head is a mis-print. I've never seen or heard of a 441 head with 63 cc chamber. You might need to call tech dir in your div. OH! You would be able to SEE the difference between 63.3 and 73.26. Big difference.

DougM · 10-10-2016, 11:20 PM

Thanks Terry!
Regards
Doug

Mike Taylor 3601 · 10-11-2016, 09:13 AM

I would double check with tech, but I have done several different small blocks that have bee n changed from 76cc to 63.3, 75 350 w/882's is one 73-74 350's w/993's is another one that has been changed.
Can spot it pretty easy takes about .150'' angle mill reduce them to 64cc.
Mike Taylor 3601

10-08-2016, 07:43 PM	#1
DougM Junior Member Join Date: Jul 2016 Posts: 10 Likes: 0 Liked 0 Times in 0 Posts	Stock Eliminator Heads 441 question Thanks to all that answered my question! Regards Doug Last edited by DougM; 10-11-2016 at 04:44 PM.

10-08-2016, 11:18 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,124 Likes: 1,581 Liked 1,875 Times in 422 Posts	Re: Stock Eliminator Heads 441 question Yes. Just because the casting number is the same, it does not mean the casting itself is the same. There are several known versions of the 441 head in particular. __________________ Alan Roehrich 212A G/S

10-09-2016, 12:01 PM	#3
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Stock Eliminator Heads 441 question The specs that are listed in the NHRA guides may or may not be what was actually produced by the auto maker (all brands). The specs listed are the specs that NHRA Tech Department chooses to accept and publish as "NHRA's Accepted Specification". The acceptance process is usually done by what the auto maker submits to NHRA as the spec for specific engines. I believe NHRA has also altered some specs by what their Tech inspectors suggest or another long NHRA process. In short, What is published in NHRA specs may never be found in a junkyard or stack of engines. On the other hand you may find parts with the NHRA specs. __________________ Adger Smith (Former SS) Last edited by Adger Smith; 10-09-2016 at 12:03 PM. Reason: SP

10-09-2016, 12:21 PM	#4
DougM Junior Member Join Date: Jul 2016 Posts: 10 Likes: 0 Liked 0 Times in 0 Posts	Re: Stock Eliminator Heads 441 question Thanks Adger and Alan. This information makes picking used heads even a bit more difficult. I will have to cc all heads as I am sure I will not be able to tell the difference between a 63 and a 74 cc chamber volume! Any tips on selecting used 441 castings? Regards Doug

10-10-2016, 07:50 AM	#5
Rich Biebel VIP Member Join Date: Jun 2007 Location: Northern New Jersey suburbs Posts: 2,315 Likes: 25 Liked 544 Times in 213 Posts	Re: Stock Eliminator Heads 441 question I never saw a 441 head with anything but the large mid 70's CC chambers... They were usually 75-76 cc's or a little larger, unmilled...... 1.94-1.5 valves and there were some with 1.6 exhausts used on I believe 1970ish 400's in trucks with 3/8ths valve stems.....IIRC.... If they made a small CC version, I never saw one.... __________________ Rich Biebel S/C 1479 Stock 147R

10-10-2016, 11:19 AM	#6
Kevin Panzino Senior Member Join Date: Oct 2002 Location: Pittsburgh Posts: 578 Likes: 298 Liked 756 Times in 139 Posts	Re: Stock Eliminator Heads 441 question I too have never seen one.

10-10-2016, 02:00 PM	#7
DougM Junior Member Join Date: Jul 2016 Posts: 10 Likes: 0 Liked 0 Times in 0 Posts	Re: Stock Eliminator Heads 441 question Thanks Rich and Kevin! I will ask the owner who is selling the entire motor if I can c.c. the heads and then I will report back if he is agreeable. Regards Doug

10-10-2016, 04:05 PM	#8
Terry Cain Senior Member Join Date: Feb 2008 Location: Georgetown, Indiana (close to Louisville, KY) Posts: 778 Likes: 530 Liked 231 Times in 107 Posts	Re: Stock Eliminator Heads 441 question I'd say that 63 cc head is a mis-print. I've never seen or heard of a 441 head with 63 cc chamber. You might need to call tech dir in your div. OH! You would be able to SEE the difference between 63.3 and 73.26. Big difference. __________________ Terry Cain ???? STK tcain19689585@gmail.com

10-10-2016, 11:20 PM	#9
DougM Junior Member Join Date: Jul 2016 Posts: 10 Likes: 0 Liked 0 Times in 0 Posts	Re: Stock Eliminator Heads 441 question Thanks Terry! Regards Doug

10-11-2016, 09:13 AM	#10
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,374 Likes: 358 Liked 308 Times in 103 Posts	Re: Stock Eliminator Heads 441 question I would double check with tech, but I have done several different small blocks that have bee n changed from 76cc to 63.3, 75 350 w/882's is one 73-74 350's w/993's is another one that has been changed. Can spot it pretty easy takes about .150'' angle mill reduce them to 64cc. Mike Taylor 3601