My New '68 Camaro Z/28 Butternut Yellow

[KurtS]

I can't confirm the pitman arm, but I think it's correct. The 391 was used on 67 Z's too. I've seen the 075 on non-Z cars.

Where would someone find the correct carb for this, back then, only a couple of months early??

[dannystarr]

Well here is THAT pitman arm # being talked about and offered for sale. All say replacement for 67 and 68 Camaro Z28. Even some of CRG guys old comments. I found it 20 times for sale all over used and new. And all say for Z28...?? Danny

 Re: 67 Z-28 Steering Knuckle Part Number [Re: KNAPPY]
Zedder Offline

Pooh-Bah

   
I see it as 3908391 and the idler is 3908385.

1968RSZ28:
Chris -

Here's the information I have on the subject...

68 CAMARO w/ Spec. Steering (exc. 302, P/S) . . . . . . . . . .  3908389  (forged 3908391)
68 CAMARO w/ P/S, Spec. Steering (exc. 302),
68 CAMARO w/ P/S (302) (exc. Spec. Steering) . . . . . . . . . . 3908379
68 CAMARO (exc. P/S, Spec. Steering) . . . . . . . . . . . . . . . . 3917575
68-69 CAMARO w/ P/S . . . . . . . . . . . . . . . . . . . . . . . . . . .  3935711


Here is one for sale for $375 right now on TC

ORIGINAL GM# 3908391 1967-68 Camaro Z/28 special fast-ratio 5-3/4" manual steering pitman arm. This arm is for manual steering cars.

Degreased and tumbled to a 100% assembly line correct finish. Ready to install.

[dannystarr]

Well I was trying to get the carb tuned and just could not make it happen. So I gave it to a friend for a rebuild. Here is what he found. Apparently this is some kind of flat track power valve mod. You can buy them from Holley, but this one is hand modified and machined. Nice ... If all you want to do is hold the throttle to the floor around a circle track      P. S. more of those close up pictures ya 'all like. Remember it's not the camera, it's who's behind it that counts.

[ss jim]

Danny, that is a power valve plug. It is used for competition where WOT is usually the norm. When the plug is used you must richen the mixture several jet sizes to compensate for a lean mixture. You may have to replace jets to return to the correct size. Hope this helps.
Jim

 

[dannystarr]

Jim, yes, that's what I was saying, some old trick for full throttle. I assume it was re-jetted during the rebuild. The guy that built it that's all he did for years is these flat track carbs. Probably over 100 of them. So he MUST know about the jetting. I have only started it for a minute to check for leaks. Front caliper is leaking internally... dang it. I was going to take it for a real drive today. Instead I gotta drive down to San Bruno to Steves Camaro and see if he can warranty this one out...

[BULLITT65]

Awesome man. Steve Pardini is a great guy to have on your side. I wish I was in the bay area to pay him a visit. He should take care of you if it was purchased through him.

[bcmiller]

What is the exact date code on the carb?  You said January, but I did not see an actual picture of that or the date code listed.

I will ask Jerry on the pitman arm.

[dannystarr]

Well I headed down to Steve's Camaros today. He warranted the caliper and threw in a set of pads. Yes he is a great guy. He is closed on the weekends, but I called his cell and he opened up for me. Scored some nice original '68 parts. Like an original water pump bypass hose, rigid pump to carb fuel line, and some other misc. goodies. I get to walk all over the place upstairs and down and look for stuff. Found original Corvette trim rings in the box. Original diamond mesh air cleaners in the GM boxes, on and on, just a treasure trove of goodies. Went next door to see his cars. He has an all original Hugger '69 Z/28 that he bought back in the 80's. And a nice original black car '68 Z/28 with Cowl Plenum. Also bought in the 80's for just a few thousand!    Then he took me to lunch down the street. Good times, nice visit.

 On a bummer note, I went back and installed the Caliper and bled it off. Threw the wheel back on and lowered it down. Installed the new fuel pump I got from Heartbeat city. And fired it up to go for a drive and the carb is messed up. Just a touch of throttle and it just keeps climbing up all by itself like it is being giv'in more throttle. But I just was holding it at like an 1/8th of an inch of throttle from outside. Then it takes a long time for it to come back down. You know, instead of racking it and having it come right back down, it goes up... then takes a long time to come back to idle. What the hell is that? I remember it happening to me in high school, but don't remember what it was. I just wanna go for a real ride, instead of the super scary 2 mile ride home the day I got the car off the truck. Couple close-ups of the bypass hose. Nice and close. Oh, and sounded a little arrogant with my last post about taking pictures. I was just quoting Ansel Adams  ... Danny  

[dannystarr]

bcmiller here is a shot of the carb numbers. And thank you for checking with Jerry on the pitman arm. I have found it several more places since my post, so I am hoping it is fine, and all those one's for sale are correct with there info.... Danny

[cook_dw]

One week off from the one I have.

[x66 714]

My 02E has that same pitman arm & has a steering gear date of A0328......Joe

[janobyte]

Assuming no bind in throttle pedal or linkage. Return spring stiff and pulling plates (and keeping) them shut.

You had the carb apart. was it rebuilt ? Metering blocks, base plate, body checked for warping ? ( machinist straight edge)

Pull off the air cleaner, have your girlfriend start the car....you operate the throttle and see what it does. Watch the squirters ,at idle, and see if it's getting a signal to pull fuel. Should not at idle. Different circuit. Check your float level ( fuel should slightly weep out the sight holes) Consider upgrading to Holley Viton needle and seats if they have not been recently replaced. Hard to trouble shoot online,,,,,does the car seem to be running rich at idle, exhaust burning your eyes ?

Holley has a great website, take a look ---steve

[NoYenko]

Danny, you might pull the vacuum advance hose off the distributor to see if the advance plate is sticking. George

[TooManyReels]

Danny, you might want to make sure there is no air leaks around the base of the carb and that the base plate did not crack when reinstalled.

TMR,,

[dannystarr]

My friend rebuilt the carb. He did JUST that for years for a living. So I ASSUME he knows what he is doing. That's how we found the wide open flat track plug in above post. I knew it was going to be hard to explain. I was just hoping somebody had that same problem in the past. There is no binding, have double springs... I did notice at one time fuel was trickling in on the left side at an idle. Then I revved it up and that went away. And didn't come back. All I can say is standing next to the car and reaching in and pulling the throttle back JUST A TOUCH... It goes up, but then begins to climb up on it's own. And I am talking 2 or 3 THOUSAND RPM's. Not just a little. Then I pull it back and it takes 5 seconds to go back to an idle. I also noticed that when it comes back, each time I have to adjust the idle screw. Cause it wants to die, OR it is up to high. Never goes back to the nice 900 idle. There is no longer white smoke coming from the exhaust, and the exhaust does not burn when standing in back of car close and bent down.That was fuel dumping in from that plug being installed. Probably didn't have to change the fuel pump, but that's ok, better to start out fresh. Got an all original rebuilt with the embossed AC logo. Advance plate not sticking cause I checked it and it runs back and forth freely. I retightened the carb down delicately with a 1/4 inch drive mini ratchet holding it in the palm of my hand. Making sure not to over tighten. It should be fine and plenty tight enough.

 I think I may have to just get another carb for now. Cause I WANNA drive it. Then send mine out at a later date. There is a Holley 4053, 3923289 brand new in the box online for $640 with free shipping. Is this ok to run and get me down the road for the summer? Not showing the car. Thanx everyone for the help so far.. Here it is... Danny  
  
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