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112293 Posts in 12900 Topics by 4937 Members
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1936  Camaro Research Group Discussion / Decoding/Numbers / Re: 69' Camaro Z28 purchase help PLEASE on: May 07, 2013, 07:47:14 PM
Id' want to see a good closeup photo of the trim tag, and for sure a great picture of the engine Pad... as well as engine cast date, and transmission stamped codes...    it looked like a pretty nice car, and obviously a lot of $$ spent putting some reproduction items on it (chambered exhaust, headers, repro battery, etc...)
1937  Camaro Research Group Discussion / Originality / Re: Starter nose for Z28 starter on: May 07, 2013, 11:09:24 AM
Well...  you'll need to search with a few different keys..      Is this the nose you need?    You get an entire rebuilt starter if it is.  for $59..
http://www.ebay.com/itm/1108367-Z28-CAMARO-CHEVELLE-STARTER-1968-8F26-/150991339853?pt=Vintage_Car_Truck_Parts_Accessories&hash=item2327c9014d&vxp=mtr
1938  Camaro Research Group Discussion / Originality / Re: Starter nose for Z28 starter on: May 07, 2013, 11:00:55 AM
there must be *thousands* of starters (available everywhere) with the correct nose you need..  *S*     just buy a used starter with the correct nose, and reassemble/rebuild it all yourself.. Smiley
ebay 'GM starters used' ??
1939  Camaro Research Group Discussion / Decoding/Numbers / Re: REAL PACE CAR? on: May 06, 2013, 10:53:34 AM
It looks questionable to me..  for several reasons, but I'm not a pace car expert... I just have always liked them!   I know body number numbers are not assigned in sequence, and there are situations which occurred, but when compared to a schedule which  'matches up' the numbers over the production year, the body number is approximately 3 months behind the VIN...   Is this possible?  typical?  or  something to do with the Pace Car production? 

It seems very odd to me when body numbers are assigned on order, or initiation, and VINs are assigned in sequence with production.   Based on VIN production would have occurred in mid-late March, whereas the Body Number is more in sequence for a June body number?   OR am I looking at something all wrong?
1940  Camaro Research Group Discussion / Originality / Re: Non dripper valve cover questions. on: May 05, 2013, 05:05:30 PM
A friend of mine had an electrical repair shop a long time ago, and he had a huge machine (tumbler) that he put the alternator bodies, etc.. into that cleaned and 'renewed' the parts.   He let me put a Z28 intake in it once, and the intake came out very nice (but it made a helluva racket) while it was being tumbled.   He told me that his machine had 'steel balls' and a cleaning solvent in it..  that did the cleaning, and I suppose the steel balls pushed the aluminum pores closed and tightened up the aluminum surfaces...
1941  Camaro Research Group Discussion / Originality / Re: Battery Side post or top question on: May 05, 2013, 09:22:37 AM
I saw two different sizes of AC Delco side post ONLY batteries last week in a local shop on a battery rack, so they should be available wherever AC Delco is sold..  like your Chevy dealer and many more places.. Smiley
1942  Model Specific Discussions / Trans-Am Camaros / Re: JL8 vs HD service package 4-wheel disc 12-bolt rear axle on: May 04, 2013, 08:08:44 PM
I located some of my notes from my last discussion wtih Bob Christensen re the Service Package rear end.   It has been many years since Bob owned that car, and raced it in T/A and IMSA, but his memory is fantastic.  I talked to him 3 or 4 yrs ago by phone (he now lives in KY).   At that time he told me the standard 12 bolt rear Posi Unit had a breakaway torque of 50 ft lbs, whereas the Service Package Posi unit had 4X that amount (200 Ft-lbs), using 22 plates and larger heavier springs in the unit.  He ran his own '69 Z28 from '69 to '74, in regional SCCA, T/A, and IMSA GT, and also ran the Bolus/Snopes Camaro with Bob Mitchell (another Huntsville, AL racer/engineer).   They finished 4th and 5th respectively in class at Sebring 12 hr race in '71.   Bob Mitchell finished 2nd in class in '70 at Sebring.   They both were very good engineer/racers and raced and competed for close to 10 yrs from late '60's to late '70's.   Both bought new '69 Camaro Z28 cars and immediately converted them for competition.   I have a few parts from Bob C's Z28 (the SP rear and the original 1st day takeoff exhaust manifolds.. Smiley.   I'd love to flesh out the specs on those service duty rears if anyone else has any info.   The one I have needs to be setup - has 4.11 gears and the original posi and two sets of axles and caliper mounting brackets, but no brake parts.   I have mid 60s' Corvette brake parts that I would like to build up the rear as close as possible to original spec A(with the parts I have).
1943  Camaro Research Group Discussion / Decoding/Numbers / *early* '68 Z28 4053 carb date code on: May 04, 2013, 10:44:37 AM
There is a 4053 carb on ebay right now, with a date code of '705'.       The seller says it represents a date of 5th week of October 1967. 
Is that accurate?    How were Nov 67 carbs dated? and Dec?   
Was there a change in the month part of the code designation somewhere along the line between '67 and '69?   
1944  Camaro Research Group Discussion / Restoration / Re: Installing grab handle and bezels on: May 03, 2013, 11:10:54 PM
I managed to remove my original glove box without damaging it.... what's the issue?
1945  Camaro Research Group Discussion / Maintenance / Re: blower motor on a 68 factory air car? on: May 03, 2013, 11:09:46 PM
i would suggest the preferred method is to remove or at least loosen the RH fender. ..  Smiley
1946  Model Specific Discussions / Trans-Am Camaros / Re: JL8 vs HD service package 4-wheel disc 12-bolt rear axle on: May 03, 2013, 11:08:01 PM
Thanks Jon!

Does anyone know of or have any documentation re the number of plates and spring pressure differences in teh posi units between the two rears?   Bob Christianson told me the differences.. and I made notes.  but can't find my notes..   From my memory, there is a significant difference in the number of plates and the Service Package rear posi has much higher spring pressures...
1947  Model Specific Discussions / Trans-Am Camaros / Re: Heavy duty GM 12-bolt axles on: May 03, 2013, 11:04:52 PM
Thanks Jon!

1948  Camaro Research Group Discussion / Originality / Re: 0 rocker arms BIG or small 0 ? differences? on: May 03, 2013, 11:28:19 AM
I've had 030 over 302's.. that would wind above 10,000 rpm with stock components... including stock rockers... Smiley
1949  Model Specific Discussions / Trans-Am Camaros / Re: Heavy duty GM 12-bolt axles on: May 03, 2013, 07:40:47 AM
Thanks Robert.
Your memory is the same as mine!  Smiley     I also have a copy of the 'Chevrolet Special Equipment' book - that I was referring to - I copied from the green sheets a friend of mine loaned me in the '70's (Robert Christianson, who also ran a '69  in Trans-Am and later and later a 73 Camaro in IMSA-GT).   My knowledge of the 'service duty' rear mostly goes to information I got from him, and later I purchased one of the rears that was used in his '69 Z28 TA car.
The reason I asked you those questions is because you are knowledgeable, and I was hoping that you could clear up some of the misinformation that is out there.   The 'few lines' in the available books dedicated to the service package rear do not do justice to the differences in that rear end, and seems to be mostly 'speculation' dreamed up by the authors...

Thanks for your informative response to my questions, and I for one would love to know more about the differences between JL8 and Service Package rears.
PS.  I also do not believe one could order a new Camaro for the street and have the factory install a service package rear end, although it's certainly possible (for a few months) to order the JL8 rear and then pay the almost $1000 for the service package (OTC) and pay the dealer to install it..  although that scenario certainly makes no sense!  As I understand it, the service package rears were difficult to get and likely required someone 'close to Chevrolet' to get one promptly for a TA car.  Bob told me he had a relationship with Vince Piggins when he was running that assisted him in getting some of the special parts.
1950  Camaro Research Group Discussion / Originality / Re: 0 rocker arms BIG or small 0 ? differences? on: May 02, 2013, 12:43:45 PM
Just out of curiosity, I have heard it's best to keep the same pivot ball to the same rocker. Are there any exceptions or is it a must to get new pivots? Mine are all mixed up in a box, all look fine with no blueing, cracks, galling or score marks. I'm using roller tip stamped steel 1.5's at the moment and probably will continue using them when I finally pull the 350 and install the 302, but what if I did go back to the 'O' rockers?
It's very easy to run the balls/rockers on a wire or string as you take them off an engine... you can even clean them that way  and they will come off in the correct order as well.. Smiley     I would suggest using a little molybdenum disulfide on the metal/metal wear surfaces on installation; especially with the mismatched ones..  it should help the two rubbing parts develop an 'affinity' for one another pretty quickly.. Smiley
I also keep lifters in order, when the come off a cam I'm going to reuse; just put them in a small box ordered in the correct fashion, and label the box for front and L/R side..  *(and moly works great on lifter/cam wear surfaces as well during breakin..)
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