1967 427/390 hp pcv hose bracket

[John H.]

Re: 1967 427/390 hp pcv hose bracket

Thanks John. I see the carb stud mounted clip in the 66 AIM for 425 HP but not for 390 HP.

Michael -

That's correct (my error) - it isn't shown in the '66 L36 section; only in the L72 section. The 6117 clip is also described in the latest '66 JG on page 107, in the same paragraph that describes the Tonawanda-installed clip.

[John P.]

Re: 1967 427/390 hp pcv hose bracket

I want to thank everyone for their input. But to be honest I am so confused. The car does have a build date of November 1966.
John

[John H.]

Re: 1967 427/390 hp pcv hose bracket

I want to thank everyone for their input. But to be honest I am so confused. The car does have a build date of November 1966.
John

John -

Based on the information I have, the only PCV hose clip or bracket you should have on your '67 is the phosphated clip off the right front carb stud.

[Michael H.]

Re: 1967 427/390 hp pcv hose bracket

Where are all the 66-67 big block experts? I'm really surprised no one has solid information on this.

[Stephen L.]

Re: 1967 427/390 hp pcv hose bracket

Here is a photo showing the PCV hose bracket on a 67 L36 engine.

[Michael H.]

Re: 1967 427/390 hp pcv hose bracket

There's a picture of a 66 390 HP that shows a left side bracket/support attached to an intake manifold bolt on page 351 in the Noland Adams book. Would 67 have the support or was this a 66 only item?

[Stephen L.]

Re: 1967 427/390 hp pcv hose bracket

Michael,
Note that in the photo you reference for a 66 and another photo of the same engine there is no bracket on the passenger side of the Carb. I'm no expert on 66's but evidently the bracket was remade and relocated as shown in my photos of my 67.
On page 414 a 67 L36 with many options shows a totally different routing of the PCV hose. My 67 doesn't have these options, so the hose routing and bracketry is dependent on how the car was optioned.

Page UPC L36 A9 in the 67 assy manual also shows the routing and bracketry for the PCV hose. (Drawing revised 10/27/66)
If you look at page UPC K19 A5 you'll note that the PCV hose has a totally different routing. Even the Carb has a different location for the connection tube. (Drawing revised 12/8/66)

The revisions lead me to believe that a change in this area happened during the 67 production yr..... so maybe some early 67 L36's had the 66 configuration.....

[Michael H.]

Re: 1967 427/390 hp pcv hose bracket

Michael,
Note that in the photo you reference for a 66 and another photo of the same engine there is no bracket on the passenger side of the Carb. I'm no expert on 66's but evidently the bracket was remade and relocated as shown in my photos of my 67.
On page 414 a 67 L36 with many options shows a totally different routing of the PCV hose. My 67 doesn't have these options, so the hose routing and bracketry is dependent on how the car was optioned.

Stephen,



Page UPC L36 A9 in the 67 assy manual also shows the routing and bracketry for the PCV hose. (Drawing revised 10/27/66)
If you look at page UPC K19 A5 you'll note that the PCV hose has a totally different routing. Even the Carb has a different location for the connection tube. (Drawing revised 12/8/66)

The revisions lead me to believe that a change in this area happened during the 67 production yr..... so maybe some early 67 L36's had the 66 configuration.....

Stephen,

Good information. Thanks. I wonder if the change on 27 Oct 1966 did indeed remove the intake manifold bolt mounted left side support for the balance of 67 production. If so, the change likely would have occurred a month or two later in production.
I know I have a few pictures of two unrestored 67 390 HP cars/engines that I owned decades ago and I know at least one had the left side bracket. Could have been early production cars? I don't remember.

Would it be possible to scan and post the page from the 67 AIM? I only have the 66 AIM here.

[Stephen L.]

Re: 1967 427/390 hp pcv hose bracket

Michael, I tried to post a scan of the pages but the system won't accept the Jpeg file (too large). I'll try again later when I've more time......

[John P.]

Re: 1967 427/390 hp pcv hose bracket

Where are all the 66-67 big block experts? I'm really surprised no one has solid information on this.

I am going to put the left side PCV bracket back on the engine as it was when the engine was pulled. I will take a chance with that configuration when the car is judged.
Thanks again for everyone's input.

[Grant W.]

Re: 1967 427/390 hp pcv hose bracket

Hi John

The pic that Stephen showed for a 67 390 hp is correct. Here is a pic of it. Black phosphated stepped metal bracket 001.jpg002.jpgand has a little O stamped on the top side as judges will see.

For a 66 Big block as per Judging manual Page 107 It uses the --through a J shaped black phosphated flat metal bracket attached to a right side carburetor attaching bolt. Blah blah blah.
Hope this sorts out your confusion.
Grant

[Ronald L.]

Re: 1967 427/390 hp pcv hose bracket

What a good thread I missed for a few months, but from a Chevy 67 427 with the original 736 PCV and hose in tact, that left side clip was on all 390 HP motors leaving Tonawanda. This clip under the carb stud, the was a thread a couple of years ago that stated it was not used on the 66 390HP.

[Ronald L.]

Re: 1967 427/390 hp pcv hose bracket

There is another thread at this forum that stated for the 66 390 HP that the "passenger side clip - under the carb stud" was not used - what is correct?

[Ronald L.]

Re: 1967 427/390 hp pcv hose bracket

here is the other thread where the conclusion was that 1966 390HP did not use hte double bent clip.

https://www.forums.ncrs.org/showthre...ight=carb+clip

thoughts, opinions, and or evidence from low mileage survivor cars?

[Ronald L.]

Re: 1967 427/390 hp pcv hose bracket

Bringing up the past, what was or was not the clip on the pass side carb nut?

If as suggested in the above mentioned thread it wasn't used on Corvette, then where did they all come from on restored cars?
Or was it 'the' clip and the straight one was the Big box invention?
Does any one know the angled clip part number and have a print?

Where did the repros come from initially, Paragon?