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View Full Version : 041x heads???


358L-Co
04-07-2011, 07:57 PM
I have some in my Elkie right now.. Apparently they are pretty sought after... Why?

oldtinsmith
04-07-2011, 08:09 PM
3947041X heads. Used in 69-70 model year, 302/350. 64cc, 165 intake port, accessory holes, good HP head.
I think they're popular because the have the accessory holes for AC & alts.

Doug:olcoot:

358L-Co
04-07-2011, 08:12 PM
Oh ok! Thanks man like my mechanic made a big deal about it so I was trying to read on it and clearly it was something before my time something similar to my elkie but im learning.. Slowly but surely

oldtinsmith
04-07-2011, 08:16 PM
I should have also said that people restoring cars and looking for that number head would make them desirable too!

Doug:olcoot:

O. D. Showtime
04-07-2011, 08:22 PM
I should have also said that people restoring cars and looking for that number head would make them desirable too!

Doug:olcoot:


:yup:

I can't recall the casting # right now but when we took the heads in to the motor guy that did my son's build he about crapped his pants...said something to the effect that the late 60's Camaro collectors would pay big buck for these....small chamber big valve double humps with accy holes

358L-Co
04-07-2011, 08:28 PM
Well thats good to know! Im glad to hear I have something people would crap their pants for!

oldtinsmith
04-07-2011, 08:37 PM
I've got a set of"186" double hump heads (1970). They were used on 350/300 (with 1.94 / 1.50. They were also used on the Camaro 350/360 and the Corvette 350/370 (with 2.02/1.60). Mine are the small valve heads:(.

Doug:olcoot:

O. D. Showtime
04-07-2011, 08:40 PM
I've got a set of"186" double hump heads (1970). They were used on 350/300 (with 1.94 / 1.50. They were also used on the Camaro 350/360 and the Corvette 350/370 (with 2.02/1.60). Mine are the small valve heads:(.

Doug:olcoot:

Thanks Doug...that's them...186...mine were the 2.02/1.60. Had em for years...last on the 383 in my 66 Chevelle..before I "loaned" em to my son.....

oldtinsmith
04-07-2011, 08:52 PM
The 2.02 heads had screw in studs while the 1.94 didn't. The "186" had a redesigned combustion chamber (63.305cc), temperature sending unit boss was added too.
The "041" was identical to the "461" head except for a redesigned combustion chamber, the addition of a temperature sending unit boss, and the accessory holes. The "041" was interchanged on some models with the "186" & "187" heads.

Doug:olcoot:

grumpyvette
04-08-2011, 10:57 AM
By today's standards the old fuelie heads are 40-50 plus year old technology that's likely to be in well worn condition and not nearly competitive, to even mildly reworked VORTEC HEADS let alone decent heads that are available

http://www.fastnuf.com/Headguide.html

http://forum.grumpysperformance.com/viewtopic.php?f=52&t=322&p=9895&hilit=flow+numbers#p9895

http://racingfeed.com/downloads/chevy_flow_data.pdf

http://forum.grumpysperformance.com/viewtopic.php?f=52&t=401&p=491#p491

http://forum.grumpysperformance.com/viewtopic.php?f=52&t=401&p=6078&hilit=large+vortec#p6078