Messages

46

Decoding/Numbers / Julian date code on THM400's in 1969 model year.

« on: June 10, 2008, 12:00:50 AM »

Hi Guys!

Can anyone give me a 101 level course on the use of assembly codes on THM400 transmissions during the 1969 model year?
Were these codes sequential, or Julian, or something else?

I have a CX coded THM400 with the following information:  69X - 395



Did each year start with number 1  and progress from there? What does the 395 designate?  Julian date, sequence number, etc.?
What does the 2160 designate?

Help would be appreciated.

Nuch

47

Decoding/Numbers / Re: BBC Oil Pans any differences???

« on: June 09, 2008, 09:09:05 PM »

Camaros, Chevelles, and Novas got the BB oil pan with the gradual up-slope from the sump area toward the front of the engine. 
Impalas and the like got the oil pan with the secondary step before the gradual up-slope. 

Corvettes got their own special oil pan when a windage tray was used.  These were L/71, L-88, ZL-1.  I don't believe the L/36 or L/68
had the windage tray provision.  Not really sure what oil pan they used.

Hope this helps a little....

Steve

48

General Discussion / Re: 1969 rallysport parts value?

« on: June 08, 2008, 03:34:48 PM »

It's hard to estimate a value as things change so often.  I see NOS actuators on ebay from time to time, as well as headlight door chrome inserts, grills, etc..
You may want to follow ebay for a while if you haven't done so.  But beware, one bidders rediculous high bid doesn't necessarily raise the bar for all other
potential bidders.  Use common sense.

Sounds like an ebay dream set of auctions for the right car.....

Nuch

49

General Discussion / Re: 396 vs 427 crankshaft

« on: June 08, 2008, 03:26:31 PM »

Numerous 427's have been found with '6223 crankshafts.  In fact, I believe all the Yenko & Copo cars used '6223 cranks in their '512 blocks as well.
As noted, the '6223 cranks used in those applications were cross-drilled & thfftrided.

The '7115 crank was an L-88 & ZL-1 oddity.  I believe this was due primarily to the reciprocating weight of those huge piston domes.  I have never
heard of a 396 being found this a '7115 crankshaft.

Colvin's book seems to indicate that 427's used a crankshaft with thicker counter-weights, however my findings don't substantiate this position.
The majority of this information ceoms from years of discussions with 427 owners.......

Nuch

50

Restoration / Re: Bumblebee Stripe placement

« on: June 01, 2008, 05:57:37 PM »

I'm no expert on the '68, but the '69 didn't get an emblem if it had the L6 engine ( 230, 250).

I know emblems were manufactured, but the AIM shows that the D/90 stripe was uninterrupted
where the emblem location was if an L6 was ordered.  Not really sure about an L6 non-D/90 car though.

Nuch

51

Originality / Re: Original "Endura" bumper brackets & mounting hardware

« on: June 01, 2008, 05:48:20 PM »

Yes Paul !  It's been quite a challenge finding all the correct, original stuff.  This search is done.  Thanks for the heads-up on that one.

Just a few more......  Original six (6) 6-lug converter bolts for my CX THM400 and original 8 screws
used to mount the flapper valve frame in the ZL/2 hood.....

Nuch

52

General Discussion / Re: 1969 Camaro RS/SS L78 Questions

« on: May 18, 2008, 12:59:30 AM »

'69 - RS/SS big block cars were not that common.  I had a shot at one years ago, but passed on it.  I still hate myself for that decision.

That THM400 is a rare find - being a CX code.  It is correct for the L/78 in 1969.  Yellow is the correct 69 color for that tag too.  Check the VIN
on the flange area where the trans pan bolts up against.  If the stamped VIN matches the car VIN - you've found the holy grail of THM400 transmissions. 
Make sure you don't loose it....  It took me 7 years to find mine!

An early RS/SS L/78, in black too.  What a great find!  With a 12A build date, the 396 block you're after is a 3955272 dated somewhere between Oct.
and mid Nov. 1968.  A late Sept. 68 block would be possible too.

Post the axle assembly code ( stamped on front side of passenger side axle tube ).

Nuch

53

Decoding/Numbers / Re: How are Q-Jets judged ???

« on: March 16, 2008, 04:32:40 PM »

Contact Phil Cancilla at Custom Rebuilt Carbs : thecarburetorman@aol.com

He's done all of my Holley & Rochester carb restorations.  He's been at it a very long time and no one knows better how they are judged.

Nuch

54

Originality / Re: 1969 SS hood

« on: March 15, 2008, 01:28:00 AM »

There are a few things you should consider.  I highly doubt any GM dealer would have made a modification to the hood like that.  Of most concern to me would
be the rain coming right in on top of the engine.  With the car moving forward and the radiator fan going full out, the water pouring into those holes would be
converted into spray and subsequently totally soak the distributor, coil, and any other electrical connections against the firewall.  Additionally, the idea of cold water
( in a rain storm ) continually coming down on hot cast iron gives me the heebee-jeebees.  Chevrolet would have had a bird over these issues.........

And yes, JohnZ is correct - GM didn't design an open SS hood like this.  Oddly enough though, I believe there was a louvered hood RPO that was cancelled in 1969.
Perhaps the engineers were trying to perfect a ram style louvered SS hood, but with rear facing openings that would be pointless.

Nuch

55

Originality / Re: Original "Endura" bumper brackets & mounting hardware

« on: February 29, 2008, 11:42:10 PM »

Ed!

You're the man!!  That's exactly what I wanted to see.

OK - how much for them? seroiusly!!!

Nuch

56

Originality / Re: Original "Endura" bumper brackets & mounting hardware

« on: February 25, 2008, 12:49:18 PM »

Thanks asm69 ! 

Yes - I'd love to see the same type of images for the outer brackets too.  Those are the ones I'm trying to locate cirrently.  If you can manage to separate the
original internal hex head bolt that holds the outer bracket to the bumper, that would be fantastic.

Thanks,
Steve

57

Originality / Re: Original "Endura" bumper brackets & mounting hardware

« on: February 24, 2008, 05:06:50 PM »

hihorse,

Your brackets are the inners - I'm looking for the outers at this point.  But I will consider them

Steve

58

General Discussion / Re: One pricey '68 Z/28...

« on: February 24, 2008, 05:03:40 PM »

This is not the only hemi-head 302 in existence.  Jim @ HeartBeatCity has at least one that I know of.

And yes, the hemi-head 302 was one of many failed programs at Chevrolet, or any car maker for that matter.  
I'm with William - who cares!  

I love my Camaro, but things are just getting out of control.  Using a more simplistic example, the dealership where
my SS Camaro was purchased installed hood pins at the original buyers request.  I get beat up all the time about them.  
Why should a dealership installed 302 be any different?

Steve

59

Originality / Re: Original "Endura" bumper brackets & mounting hardware

« on: February 21, 2008, 01:41:53 PM »

Great - thanks!

60

Originality / Re: Original "Endura" bumper brackets & mounting hardware

« on: February 21, 2008, 01:39:14 AM »

William,

Thanks for responding.  Please allow me to clarify:  I own a pristine Endura bumper, but it does not have any of the attaching hardware. 
The image I posted is of one I found online.  I don't own it, just merely posted an image to clarify my point.  My main problem is that I
can't seem to find what the original bracketry & mounting hardware looked like.

Steve