[steve25]

Ram4king can you provide casting dates on those and if the air injection is used?

I agree Rocky, the investigation can be addictive!

[johnta1]

Ever see a set like this?

James Bond Double OH Seven head?

Interesting.

[steve25]

I don't know that these are not 061 castings!

Are the castings on a original GTO, or bird?

Pressed in rocker studs would make it a 061 casting so you may even be able to just take a peak in thru the oil filler cap to prove this out.

[Rocky Rotella]

Ram4King, very cool!

Like Steve, I would guess 061, but can't say for sure without other details like chamber shape and rocker stud type.

Thanks for sharing!

[Rocky Rotella]

Originally Posted by 67GP428

My '67 GP 428 WG 4 speed. No markings. Cleaned off the old paint, that's why a little different color. Scott

Thank you!

[steve25]

Did the 061 headed motors come with a Carter 4 bbl, or a Q jet?

[GRX]

Originally Posted by Ram4king

Ever see a set like this?

Yes. Have a pair on my shelf. Seems the '061' numbers have two configurations.

>> http://forums.maxperformanceinc.com/...d.php?t=503112

[steve25]

Boy! Looks like foundry workers screwed Down casting tags onto wherever they cared to at times, as I have seen quite a few 061 castings , but all the verticle numbers on one Exh port is new to me!

[Rocky Rotella]

Originally Posted by GRX

Yes. Have a pair on my shelf. Seems the '061' numbers have two configurations.

>> http://forums.maxperformanceinc.com/...d.php?t=503112

Thanks for the photos!

That's correct. I've seen them both ways.

["QUICK-SILVER"]

Originally Posted by brut4s

I saw this, not sure if it helps you or not Rocky.
https://www.facebook.com/alan.sweari...location=group

Originally Posted by Rocky Rotella

Sorry, I’m not on Facebook. Can you tell me what it says?

Don't know for sure but it may have been in reference to a trim tag decode.
Where Z=3 speed auto

Clay

[4zpeed]

Originally Posted by johnta1

James Bond Double OH Seven head?

Interesting.

LM@O John!

"dum da da dum dum Dum Dum... dum da da dum Dum dum dum..."

Probably got the casting tag in his shoe...

Um... er a, maybe I'm thinken a Max.

Yea Chief, I got 99 taggen the heads for the trade with KAOS.


....
Frank

[ck67goat]

Originally Posted by Mister Pontiac

Rocky,

Just to add in another bit of possible confusion, I have a base YH 428 out of a 67 Grand Prix that appears to me to be blank (no stampings). I double checked again today just to be sure, and I can't find any stampings. The heads do have some rust on them, but after wire brushing the area, I cannot see any remnants of a stamping on either head. So...

To the best of my knowledge, this engine has not been apart since it left the factory 50 years ago. From what I understand (from a fellow PY'er I bought it from), it was pirated from a 67 GP back around 1971 following an accident that destroyed the car. After that, it sat in two different garages for 40 years untouched before I bought it and installed it in my wagon. It still has not been apart.

So if its history is accurate, mine in a base 428 out of an automatic GP, yet it has no stampings (blank).

Hmmm...

I've seen blanks like those almost 30 years ago at a car show. I believe a full size 67. To my recollection, the owner said they were service replacement heads. I could also swear I heard somewhere it was not uncommon for the 670s to be replaced by the dealer, can't remember why or where. Oddly, I have a 67 YK block from the original owner and the 670s were dealer replaced by 62s that were cast in the early 70's, so maybe they either stopped casting or never did cast service replacement 670 heads for some reason. I'm going out on a limb to guess maybe it's because the chamber design was no longer being cast. Would be interesting to know which chamber design your heads have.

[steve25]

You may have hit on something!
Once the factory confirmed that the open chamber in the late season 061 casting had better emissions they likely stopped casting replacement 670 heads to go on part shelves!

[GTO_AL]

I’ve already talked with Rocky on this but thought I’d share with all. Another set of 670x heads, original to my ‘67 GTO with Ram Air. These heads dated J146 and have the X stamp. These are the dirtier looking in the pics.
I’ve also got a set of mid January ‘67 670X heads that I aquired separately as well as a late ‘67 9792510 XS motor with matching 997 heads with the X stamping.

[steve25]

Thanks for posting!

[Rocky Rotella]

Thanks for contributing, GTO_AL. Hope you're well!