Author Topic: PR coded 67 rear - 3.31 Posi metallic brakes  (Read 5692 times)

firstgenaddict

  • Hero Member
  • *****
  • Posts: 2882
  • caretaker of 1971 LT1's 11130 & 21783
    • View Profile
    • Groome Family Automobiles
PR coded 67 rear - 3.31 Posi metallic brakes
« on: October 08, 2015, 04:17:51 AM »
Recently acquired this rear end...
How rare is this animal?










James
Collectin' Camaro's since "Only Rednecks drove them"
Current caretaker of 1971 LT1's - 11130 and 21783 Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://plus.google.com/photos/112392262205377424364/albums?banner=pwa

ZLP955

  • Hero Member
  • *****
  • Posts: 2186
    • View Profile
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #1 on: October 08, 2015, 08:47:42 AM »
Would that make it either J56 (205 units) or J65 (1217 units) then?
Tim in Australia.
1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA.
AHRA Formula Stock at Lions Dragstrip, NHRA E/MP at Pomona Raceway

firstgenaddict

  • Hero Member
  • *****
  • Posts: 2882
  • caretaker of 1971 LT1's 11130 & 21783
    • View Profile
    • Groome Family Automobiles
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #2 on: October 08, 2015, 07:11:04 PM »
J65 the J56 is only available with the Z28.
James
Collectin' Camaro's since "Only Rednecks drove them"
Current caretaker of 1971 LT1's - 11130 and 21783 Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://plus.google.com/photos/112392262205377424364/albums?banner=pwa

ZLP955

  • Hero Member
  • *****
  • Posts: 2186
    • View Profile
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #3 on: October 08, 2015, 07:58:54 PM »
So you know it's not from a Z James? Or is it the ratio or assembly date that makes you think unlikely to be from one? Then possibly an SS 350?
Tim in Australia.
1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA.
AHRA Formula Stock at Lions Dragstrip, NHRA E/MP at Pomona Raceway

bcmiller

  • CRG Member
  • *****
  • Posts: 4010
    • View Profile
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #4 on: October 08, 2015, 08:07:33 PM »
Pic has a shadow, can you confirm the casting date?

3.31 mostly like from an SS350 car. Pretty unlikely that it would be from a Z.
Bryon / 1968 Camaro SS 396 coupe - now old school 468 big block
1967 Camaro RS/SS 396 coupe L35/M40 - 4 generation family project
Looking for 68 Camaro with body # NOR 181016

vtfb68

  • Hero Member
  • *****
  • Posts: 527
    • View Profile
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #5 on: October 08, 2015, 10:42:46 PM »
only 602 67 Z 28's
   VT
68 05C LA RS/SS U2 712 L34 M21 BR
68 08E LA RS Y2 749 L30 M35
67 11B LA  RS/SS M-1 797-Z L48 M21  Convertible

firstgenaddict

  • Hero Member
  • *****
  • Posts: 2882
  • caretaker of 1971 LT1's 11130 & 21783
    • View Profile
    • Groome Family Automobiles
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #6 on: October 09, 2015, 02:37:54 AM »
It is a J65 4 wheel metallic drums. From a 67 SS 350 most likely.


Z28 would have had J56.
James
Collectin' Camaro's since "Only Rednecks drove them"
Current caretaker of 1971 LT1's - 11130 and 21783 Check out the Black 69 RS/Z28 45k mile Survivor and the Lemans Blue 69 Z 10D frame off...
https://plus.google.com/photos/112392262205377424364/albums?banner=pwa

ZLP955

  • Hero Member
  • *****
  • Posts: 2186
    • View Profile
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #7 on: October 09, 2015, 06:25:12 AM »
Apologies for my obvious confusion, but how do you know this is a J65 rear end? I agree that the 3.31:1 ratio would suggest not originally from a Z, but maybe a road race application? Especially considering low level of 'general' public awareness of RPO Z28 in 67.
The PR application stamp only confirms metallic brake linings and final ratio, not what type of front brakes the car it was assembled in had.
Tim in Australia.
1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA.
AHRA Formula Stock at Lions Dragstrip, NHRA E/MP at Pomona Raceway

ZLP955

  • Hero Member
  • *****
  • Posts: 2186
    • View Profile
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #8 on: October 09, 2015, 09:34:38 AM »
Never mind, I read Jon Mello's comments in your thread over at sYc which explained why it's not from a Z: http://www.yenko.net/ubbthreads/ubbthreads.php/topics/630157/1
Tim in Australia.
1969 04A Van Nuys Z/28. Cortez Silver, Dark Blue interior, VE3, Z21, Z23, D55/U17, D80, flat hood.
Sold at Clippinger Chevrolet in Covina, CA.
AHRA Formula Stock at Lions Dragstrip, NHRA E/MP at Pomona Raceway

Butternut1967

  • Member
  • ***
  • Posts: 28
    • View Profile
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #9 on: December 04, 2019, 12:13:58 AM »
Question, with a PR coded 67 rear built in October of 1966, prior to the introduction of the Z/28, would the car come with drum brakes on the front? Could the drum brakes have been power drum?
Thanks
1967 Camaro RS/SS Convertible 11A WXDL 2ELGR 3SL 4P 5Y
Rebuilding of 1967 RS headlight motors

Jon Mello

  • CRG Member
  • *****
  • Posts: 4413
    • View Profile
Re: PR coded 67 rear - 3.31 Posi metallic brakes
« Reply #10 on: December 15, 2019, 04:53:26 AM »
Question, with a PR coded 67 rear built in October of 1966, prior to the introduction of the Z/28, would the car come with drum brakes on the front? Could the drum brakes have been power drum?
Thanks

Yes, it would have come with drum brakes on the front because of the Oct '66 build date which is too early for J56.  The J65 metallic brake option could have had J50 power brakes added if a buyer wanted it.
Jon Mello
CRG