[Progolfer]

Hey Rocky - I posted some pics Friday night but for some reason the post didn't show up. I have 2 - 670 heads with Z on them. At first I thought they were from a WS Block HO engine that I purchased 35+ years ago. They still have the stock exhaust manifolds on them which makes me think they are standard 335 hp heads K066 & K146. Do you think these could be the original heads from the 67 GTO. I am guessing the date codes are November 6, 66 and November 14, 66. Which matches the build of the car as we have discussed in the past :-) Hope this helps.

Frank

[Rocky Rotella]

Originally Posted by Progolfer

Hey Rocky - I posted some pics Friday night but for some reason the post didn't show up. I have 2 - 670 heads with Z on them. At first I thought they were from a WS Block HO engine that I purchased 35+ years ago. They still have the stock exhaust manifolds on them which makes me think they are standard 335 hp heads K066 & K146. Do you think these could be the original heads from the 67 GTO. I am guessing the date codes are November 6, 66 and November 14, 66. Which matches the build of the car as we have discussed in the past :-) Hope this helps.

Frank

Frank,

I believe the 1967 model year was the only year that "I" was void in the cast date sequence. That would make your K-dated cylinder heads October 6 and 14, respectively, and that makes it much more logical that they could be installed on an October-built '67 GTO.

I would LOVE to believe that they are original to your GTO, but it was built on October 20 at the Kansas City plant. I would think that the timeline of the 670s being cast, machined, assembled, installed on an engine all at the Pontiac, Michigan plant and then shipped by train to KC and installed in a vehicle within 6 days would seem extremely tight. It's certainly possible, however!

[Progolfer]

Originally Posted by Rocky Rotella

Frank,

I believe the 1967 model year was the only year that "I" was void in the cast date sequence. That would make your K-dated cylinder heads October 6 and 14, respectively, and that makes it much more logical that they could be installed on an October-built '67 GTO.

I would LOVE to believe that they are original to your GTO, but it was built on October 20 at the Kansas City plant. I would think that the timeline of the 670s being cast, machined, assembled, installed on an engine all at the Pontiac, Michigan plant and then shipped by train to KC and installed in a vehicle within 6 days would seem extremely tight. It's certainly possible, however!

That makes sense and would make it a tight timeline - I hate to say it's been too long and too many moves to remember which heads these are. If these are the heads off of the WS engine that I bought, would the WS engine have had std exhaust manifolds or would it have had the ramair manifolds?

[Aluminum Chief]

My 67 HO 4 speed car has a Z dated A047 and my 67 Ram Air 4 speed car is up on a lift with a car under it, I will try and get to that in the morning. KC

[242177P]

Starting to see a trend here....

H256 and H266, both stamped with an O. YS
K036 and K046, both stamped with an O. YZ