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D1ZE 4v heads ?
#1
I got these rebuilt D1ZE-DA 4V heads for my motor..And was having a bit of a time looking them up...They have bigger valves than my late cleveland q code heads "confirmed today with a tape measure" Most things that pop up when i look them up is 351 boss or 302 boss replacement heads?..Figured Don or one of you guys mite be able to tell me for sure..No matter what they going on my car..hehe..Just wondering what they was from?


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#2
Those are 71' CJ heads. A lot harder to find than the closed chambered ones. Check this out:

http://mustangtek.com/heads/Heads.html

Ritchie
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#3
shgrrttn;145910 Wrote:Those are 71' CJ heads. A lot harder to find than the closed chambered ones. Check this out:

http://mustangtek.com/heads/Heads.html

Thanks man...Yup that seems to be them...i was wondering what was up with the open chambers and being a 71 head....They got question marks next too them on the site?..lol

Unconfirmed Application.

Information may or may not be complete or accurate. The information provided cannot be validated or the information has not been validated from actual publications.Take it for what its worth.

Unknown or incomplete Application.

No information on the part has been found. At best, the information listed is one persons hearsay or an educated guess.

So they not sure? lol
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#4
hyena429;145914 Wrote:
shgrrttn;145910 Wrote:Those are 71' CJ heads. A lot harder to find than the closed chambered ones. Check this out:

http://mustangtek.com/heads/Heads.html

Thanks man...Yup that seems to be them...i was wondering what was up with the open chambers and being a 71 head.lol...They got question marks next too them on the site?..lol

Unconfirmed Application.

Information may or may not be complete or accurate. The information provided cannot be validated or the information has not been validated from actual publications.Take it for what its worth.

Unknown or incomplete Application.

No information on the part has been found. At best, the information listed is one persons hearsay or an educated guess.

So they not sure? lol

Yeah its kind of goofy that they would say that, but I read somewhere else about the 71' CJ heads had the bigger valves with open chambers. What are the date codes on these?

Ritchie
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#5
Just got them home today..they got valve covers on still...he bolted them on in the shop to keep the dust out....ill have to take them off and check.
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#6
Cool. I'll be interested to know.

Ritchie
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#7
Ritchie is correct in stating or inferring that the 1971 4V Open Chambered ("Q" Coded) heads on our Mustangs are rarer than the Closed chambered ("M" Coded) heads for 1971 as there were less than 150 "Q" coded Mustangs built in 1971 while there were over 19,000 "M" Coded Mustangs built in 1971.

Keep in mind that the closed (Quench) chambered Mustangs had a higher compression ratio than the open chambered heads. It would appear that most of the "Q" coded mustangs were built in late 1971. In 1972, the "M" coded (closed chambered heads) were no longer offered but the "Q" coded (Open chambered) heads were produced to the tune of over 10,000 in 1972 and over 12,000 in 1973 in our Mustangs.

BT

Do the RIGHT thing.
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#8
cobra3073;145936 Wrote:Ritchie is correct in stating or inferring that the 1971 4V Open Chambered ("Q" Coded) heads on our Mustangs are rarer than the Closed chambered ("M" Coded) heads for 1971 as there were less than 150 "Q" coded Mustangs built in 1971 while there were over 19,000 "M" Coded Mustangs built in 1971.

Keep in mind that the closed (Quench) chambered Mustangs had a higher compression ratio than the open chambered heads. It would appear that most of the "Q" coded mustangs were built in late 1971. In 1972, the "M" coded (closed chambered heads) were no longer offered but the "Q" coded (Open chambered) heads were produced to the tune of over 10,000 in 1972 and over 12,000 in 1973 in our Mustangs.

BT

Thanks for that info...Hell...They even rarer than Boss heads..lol..in 71 that is...I'll take of the valve covers tomarrow if i get the time and check out dates.
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#9
So, you had small valve '73 4V heads too huh? Makes my wonder what my motor has..

1973 Mach 1 Q code 351 4V, 9A paint, standard interior, 3.50 rear, C6 trans.
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#10
Totalled;146021 Wrote:So, you had small valve '73 4V heads too huh? Makes my wonder what my motor has..

Yup...I use to think it was a myth..But yup..My late CJ seems to have smaller valves in them too.
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