1969 Z-28 041 heads
 

1969 Z-28 , 2.02 Heads Complete, 3947041, dated D/11/9 & J/8/8, told only been rebuilt once and he had them done, washed them up and glass beaded the surfaces and everything looks fine, you get the same warranty I got, None, you need to be comfortable buying them “as is” like I did, $275.00, only thing screwy, is two of the ex guides slide down out of the place and are hanging down, many detailed pics for the buyer.

Re: 1969 Z-28 041 heads
 

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Re: 1969 Z-28 041 heads
 

Bud, You have a PM.

Re: 1969 Z-28 041 heads
 

SOLD- pending payment.

Re: 1969 Z-28 041 heads
 

Bud:

I also have an extra set of 041 heads, but have been reluctant to advertise them as being correct for a Z/28 even though Colvin's book states they were interchangeable with the 186 heads. I am NOT implying you should not have listed them as such, but am just curious. Have any original Z/28's been documented with 041 heads? Frankly I can't see any difference between the 041 and the 186 other than the casting symbol. Have been told the 041 actually flows slightly better. Also, seems like every Z11 and Z10 car with the original 295 horse 350 has 041 heads.

Thanks in advance for any input.

Lynn

Re: 1969 Z-28 041 heads
 

The easy way of determining original 202 heads is looking at the two outer walls that separate the four chambers/pockets of valves.The two outer walls (that separate the big valves from each chamber)are thinner than the middle one. 194's are all the same thickness.

Re: 1969 Z-28 041 heads
 

I agree Jim. I don't think there is any dispute that some of the 041 heads were machined from the factory for 2.02 intakes. Also don't believe there is any question that some Corvettes came with 041 heads, some with both 2.02 and some with 1.94 intake valves.

However, I am wondering if anyone is aware of an original 69 Z/28 that came with 041 heads. I should ask Jerry M, as he has likely looked at as many original cars as anyone in the country.

Lynn

Re: 1969 Z-28 041 heads
 

041's didn't come on 69Z's. 186 casting did. 041 were small valves and 186's also had a 1.94 intake valve. 350/300hp cars were 1.94's. some 186 casting suppositly showed up on SS cars, but I never saw them.

Re: 1969 Z-28 041 heads
 

The pics Bud sent me, these 041 heads have 202's and 160's

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
041's didn't come on 69Z's. 186 casting did. 041 were small valves and 186's also had a 1.94 intake valve. 350/300hp cars were 1.94's. some 186 casting suppositly showed up on SS cars, but I never saw them.

[/ QUOTE ]

Sam:

I have seen quite a few 186 heads on 69 350's. In fact I almost bought a 69 full size a few years back just to get the block and heads (which were both 186's) a real "old lady's car that had not been tampered with. A friend of mine bought a full size chevy for the same reason and it turned out to have a 186 head on one side and an 041 on the other, with casting dates within a week of each other and just prior to the build date. Both still had the factory head gaskets.

Like you, I have never seen a Z/28 with 041 heads, but Colvin's book clearly states it could be. I have always been skeptical.

Anyone else?

Lynn

Re: 1969 Z-28 041 heads
 

My car has 186 heads and is an SS350 car and the heads are original.
I doubt any 041 head came on a 69 z28. 041 heads came on Tonawanda built engines in the many cases I have seen. I have never seen a documented DZ engine with 041 heads.

Re: 1969 Z-28 041 heads
 

Honestly dont know guys, the book said application so I went off that, and as far as I can tell these are stock looking heads with screw in studs and big stock looking valves, spring pockets are stock "not" "cut" /opened up for oversize springs, no Z expert by a long shot but they sure looked stock to me.

Mortec says the same thing....I would agree Colvine may be wrong, but Mortec surely would have corrected any typo being a online site that can be corrected with a key stroke.

3947041....69-70...302/350......"Right angle" casting identifier, 64cc chamber, accessory holes, good HP head


I will take this to pm with Rob, but just so we are clear I am very honest and dont sell Junk, and if I dont know about something I tell ya up front if its junk or what ever. I also will take back anything from a member on this site minus shipping if they think they dont like whatever they picked up.

no offense taken, this is just for all the lurkers that dont speak up much I dont want them wondering wtf?? about me.

Bud.

Re: 1969 Z-28 041 heads
 

69 Z/28 heads have pressed in studs. I believe the LT1 186 heads started the screw in studs. I am not really going by a book just memory. Could be a little foggy these days. https://www.yenko.net/ubbthreads/imag...emlins/eek.gif

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
I am not really going by a book just memory

[/ QUOTE ]

Your memory is as sharp as a tack! https://www.yenko.net/ubbthreads/imag...iggthumpup.gif

Re: 1969 Z-28 041 heads
 

I believe Colvin's book also lists 041 heads for 70 Yenko deuces.I discussed this with Marlin some time ago, and so far none have been found with them on.
They're a very good head.

Re: 1969 Z-28 041 heads
 

To our knowledge and research, the Z28 engines came with 186's from the factory, and the replacement head was the 041. Several claims have been made that the 041 was factory installed, so we checked into it and found none. In addition to the Z28's, we checked every deuce we could and every deuce has the 186's.

I wonder what the Certified Stock ruling would be on this issue? If you pulled the cover and found a pair of 041's, would they bounce you - Rob?

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
They're a very good head.

[/ QUOTE ]

So, they would be good heads to have on a properly built SB?

Re: 1969 Z-28 041 heads
 

Just as good if not better than the 186 head.

Bud: I don't doubt your honesty in any way, and that was not my intent when "hijacking" this thread. I was just curious. Glad no offence was taken.

Lynn

Re: 1969 Z-28 041 heads
 

Does any one else have any 68 041's? My 68 L-30 has a set.Cast in late June F 26 ( I think) on a 0702EE block.Hard to find another L-30 that late in 68.Does not have accessory holes in the front of the head either......Anyone?


Steve

Re: 1969 Z-28 041 heads
 

Bud your first thru the spanking machine next weekend. https://www.yenko.net/ubbthreads/imag...mlins/grin.gif

Re: 1969 Z-28 041 heads
 

That sounds too kinky for me

Re: 1969 Z-28 041 heads
 

2nd. https://www.yenko.net/ubbthreads/imag...mlins/haha.gif

Re: 1969 Z-28 041 heads
 

Good lord!! Darren not me!, Bob, Denise and myself or going to hold up in some ones trailer with a cooler full of cold ones........

just in '71 Z-28 heads...lots of pesos.

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
Bob, Denise and myself

[/ QUOTE ]

https://www.yenko.net/ubbthreads/imag...mlins/haha.gif

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
Does any one else have any 68 041's? My 68 L-30 has a set.Cast in late June F 26 ( I think) on a 0702EE block.Hard to find another L-30 that late in 68.Does not have accessory holes in the front of the head either......Anyone?
Steve

[/ QUOTE ]

Steve:

This is the first I have ever heard of 041 heads for 68 without the accessory holes. Are the bosses present, but just not drilled?

Lynn

Re: 1969 Z-28 041 heads
 

No bosses present.

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
Does any one else have any 68 041's? My 68 L-30 has a set.Cast in late June F 26 ( I think) on a 0702EE block.Hard to find another L-30 that late in 68.Does not have accessory holes in the front of the head either......Anyone?


Steve

[/ QUOTE ]


didnt we discuss your heads over at Chevytalk this last fall???

Re: 1969 Z-28 041 heads
 

I don't believe so.(FYI just signed on and searched for info there,can you get me a link to the topic?)....Yes,they do have bosses.Here are some pics......


Steve

Re: 1969 Z-28 041 heads
 

casting # and date.....



Steve

Re: 1969 Z-28 041 heads
 

Do the 68 double hump, big valve heads have bosses? I don't think the 68 Z heads have any bosses. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
I don't believe so.(FYI just signed on and searched for info there,can you get me a link to the topic?)....Yes,they do have bosses.Here are some pics......


Steve

[/ QUOTE ]


Steve you will have to search..I recall talking about a motor in car a guy was looking at and he had the same heads, I couldnt believe they were not drilled and threaded for acc...I looked last night a little also and came up empty, try anything I replied to or something like help me decode my motor....

Bud.

Re: 1969 Z-28 041 heads
 

No,only the 041's did.I've been curious as to when production started in the 68 model year on this head.Is late June the earlist production?Did any of the SS 350 cars use it late in 68? Just digging for more info on the late L-30 cars.......

Steve https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: 1969 Z-28 041 heads
 

Thanks Bud,I know I asked/posted over at the CRG........No results.I'll search again on CT.......


Steve

Re: 1969 Z-28 041 heads
 

do some digging... then post up, guy was / is a reg on there with us..I have hazy recall about a 68 red vert he was looking to buy and there we discussed the motor after he posted pics while trying to decode the car to make sure it was right..supposed nice old man car clean driver cond,,,I dont think he bought it though for some reason....

Re: 1969 Z-28 041 heads
 

This guy is pretty confident about the 041 head. Ebay

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
This guy is pretty confident about the 041 head. Ebay

[/ QUOTE ]

I have still never heard of a documented case of 041 on a 302. Not saying it couldn't happen, just haven't seen it. I have to be a bit skeptical of this guy, especially in light of this statement:

"According to GM, a book called "Chevy By The Numbers" and other experts these heads were only used in late 68 and early 69. Then they were replaced by the heads with casting number #3927186....Most all experts agree that these heads are in fact very-very-very rare."

They were definitely made all through the model year. I had a set dated Sept of 69. I have seen several on pace cars and Z10's made in April & May.

Don't know where he is getting this info.

Steve:

Your heads are quite interesting, and obviously used at the end of the 68 model year even though they were cast for the 69 as evidenced by the bosses. Have heard stories of other early 69 parts that made it on to late 68 cars, but yours is the first I have actually seen pics of. Pretty cool.

Lynn

Re: 1969 Z-28 041 heads
 

My Radiator has a 69 code as well.......I'll get the # if interested.Strange things happen late in production..... https://www.yenko.net/ubbthreads/imag...lins/dunno.gif


Steve https://www.yenko.net/ubbthreads/imag...lins/beers.gif

Re: 1969 Z-28 041 heads
 

[ QUOTE ]
This guy is pretty confident about the 041 head. Ebay

[/ QUOTE ]I think he will keep them for a while at that price.