Go Back   The Supercar Registry > General Discussion > Technical & Restoration


Reply
 
Thread Tools Display Modes
  #1  
Old 06-26-2018, 07:01 PM
L16pilot L16pilot is offline
Yenko Paid Member
 
Join Date: Mar 2016
Location: Maryland
Posts: 129
Thanks: 23
Thanked 23 Times in 21 Posts
Default Holley Carb Ink Stamp decode

Has anyone been able to decipher the ink stamp codes on production line Holley carbs? Specifically, I am interested in 1970 List-4555 for the 1970 Z28. Below is a photo I pulled from a Nova site www.chevynova.org, showing the ink stamp on top of the front fuel bowl, but there are also ink stamps on the top of the rear fuel bowl, secondary vacuum canister and another 2-digit stamp on either the driver's side airhorn or top of front fuel bowl. I would like to correctly reproduce the stamp markings on my 70Z project, but would like to understand the logic/meaning of the codes.
Attached Images
 
__________________
1970 Z28, Norwood 05C, original-unrestored,
1970 Z28, Norwood 03A, Finally to body/Paint Feb 2018
1980 Z28, Norwood 11D, nice original driver
www.2ndGenZ.com
Reply With Quote
  #2  
Old 06-26-2018, 07:03 PM
L16pilot L16pilot is offline
Yenko Paid Member
 
Join Date: Mar 2016
Location: Maryland
Posts: 129
Thanks: 23
Thanked 23 Times in 21 Posts
Default

BTW, based on another ink stamp code, I believe the code in the above photo is 4702N4. At tfirst glance I thought the "0" was a "C".
__________________
1970 Z28, Norwood 05C, original-unrestored,
1970 Z28, Norwood 03A, Finally to body/Paint Feb 2018
1980 Z28, Norwood 11D, nice original driver
www.2ndGenZ.com
Reply With Quote
  #3  
Old 06-26-2018, 08:09 PM
SS427 SS427 is offline
Yenko Paid Member
 
Join Date: Jul 2001
Location: Pleasant Plains, IL
Posts: 8,620
Thanks: 216
Thanked 244 Times in 137 Posts
Default

For what it is worth, these photos are from Jason Ayers 1100 mile survivor 70 Z28, automatic.
Attached Images
  
__________________
Rick Nelson
Musclecar Restoration and Design, Inc
www.musclecarrestorationanddesign.com
https://www.youtube.com/watch?v=62r-6vgk2_8
specializing in REAL LS6 Chevelle restorations
Reply With Quote
  #4  
Old 06-26-2018, 09:21 PM
L16pilot L16pilot is offline
Yenko Paid Member
 
Join Date: Mar 2016
Location: Maryland
Posts: 129
Thanks: 23
Thanked 23 Times in 21 Posts
Default

"For what it is worth, these photos are from Jason Ayers 1100 mile survivor 70 Z28, automatic."

Thanks Rick. Comparing the 4490 carb markings to the 4555 markings, the front airhorn stamp matches the stamped List # and the secondary vacuum canister stamp is the same for both with either "7540" or "754D"....no sure if the last digit is alpha or numeric. I am guessing the stamp on the side of the airhorn could be a date or assembler #. But the six digit stamp on top of the fuel bowls has me baffled.

The 4555 carb referenced has an 021 (1st week of Feb 1970) date stamp on the airhorn. The 4490 carb has an earlier 012 (2nd week of Jan, 1970) date stamp.
__________________
1970 Z28, Norwood 05C, original-unrestored,
1970 Z28, Norwood 03A, Finally to body/Paint Feb 2018
1980 Z28, Norwood 11D, nice original driver
www.2ndGenZ.com
Reply With Quote
  #5  
Old 06-29-2018, 02:38 PM
YENKO DEUCE REGISTRY's Avatar
YENKO DEUCE REGISTRY YENKO DEUCE REGISTRY is offline
Senior Member
 
Join Date: Apr 2000
Location: PA
Posts: 12,911
Thanks: 180
Thanked 75 Times in 40 Posts
Default

This is where us Deuce guys go for LT1 detail pics, just page down - the ink stamps on the 4555 are all there, and its an 021 built Holley....

http://chevynova.org/1970LT1_Engine.html
__________________
Marlin
70 Yenko Nova-350/360, 4speed M21, 4.10 Posi (Daddy's Ride)
69 SS Nova-396/375hp, 4speed M20, 3.55 Posi (Benjamin's Ride)
67 RS Camaro-327/250hp, 2speed Glide, & 3.08 Open (Danny's Ride)
Reply With Quote
The Following User Says Thank You to YENKO DEUCE REGISTRY For This Useful Post:
tunes (06-30-2018)
  #6  
Old 06-29-2018, 05:16 PM
L16pilot L16pilot is offline
Yenko Paid Member
 
Join Date: Mar 2016
Location: Maryland
Posts: 129
Thanks: 23
Thanked 23 Times in 21 Posts
Default

...us Z28 guys also.
__________________
1970 Z28, Norwood 05C, original-unrestored,
1970 Z28, Norwood 03A, Finally to body/Paint Feb 2018
1980 Z28, Norwood 11D, nice original driver
www.2ndGenZ.com
Reply With Quote
  #7  
Old 06-29-2018, 05:47 PM
BCreekDave BCreekDave is offline
Yenko Paid Member
 
Join Date: Sep 2016
Location: Dayton Ohio
Posts: 184
Thanks: 20
Thanked 27 Times in 23 Posts
Default

Not to hijack this thread (sorry Steve), but can anybody confirm the spark plugs on the reference Deuce engine have been changed? The 1100 mile Z28 has one stripe plugs Acniters and I've seen others that show one stripe as assembly line fitted.

Not mine:
https://www.ebay.com/itm/NOS-AC-R43-...09037?var=null
__________________
70Z28 04B Norwood Forest Green-white Stripes Black DeLuxe Interior
Owned since 1978 - First Car
Reply With Quote
  #8  
Old 06-29-2018, 11:27 PM
ronzz572 ronzz572 is offline
Yenko Paid Member
 
Join Date: Oct 2010
Location: pittsburgh pa.
Posts: 191
Thanks: 7
Thanked 11 Times in 11 Posts
Default

I also have used information from the motor to restore my 70 z28 motor. My motor after it came from the hot tank had the very same paint marks. Steve Maybe Eric Jackson will see this post and give us a answer.
__________________
1970 z28 4speed cranberry red white stripes standard saddle interior nicely restored. 1970 camaro ss 396 L78 4 speed cranberry red standard black interior # matching 1 of 600 made. 1970 z28 4 speed shadow gray black stripes standard black interior. 1970 z28 automatic Daytona yellow black stripes deluxe black interior.
Reply With Quote
  #9  
Old 06-30-2018, 12:29 AM
John Brown's Avatar
John Brown John Brown is offline
Yenko Paid Member
 
Join Date: Mar 2002
Location: South Bend, Indiana
Posts: 2,262
Thanks: 21
Thanked 34 Times in 27 Posts
Default

I wanna see the date on the AC spark plug box. If it's not 1970 dated, it's not real.
__________________
John Brown

This isn't rocket surgery.....
Reply With Quote
The Following User Says Thank You to John Brown For This Useful Post:
YENKO DEUCE REGISTRY (07-02-2018)
  #10  
Old 10-18-2018, 04:16 PM
BCreekDave BCreekDave is offline
Yenko Paid Member
 
Join Date: Sep 2016
Location: Dayton Ohio
Posts: 184
Thanks: 20
Thanked 27 Times in 23 Posts
Default

Quote:
Originally Posted by John Brown View Post
I wanna see the date on the AC spark plug box. If it's not 1970 dated, it's not real.
Could be a case where there isn't a box? If its an assembly line only item, how would there be a box? Maybe they "walked" out the door back then?
But I agree, I would need some kind of origination evidence or something before spending that kind of money.

Back to the original topic and again sorry for the hijack, but Steve did you come to any conclusions about the ink stamps?
__________________
70Z28 04B Norwood Forest Green-white Stripes Black DeLuxe Interior
Owned since 1978 - First Car
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.