Identification assistance 1972 Z28

Discussion in 'VIN, Trim Tag & Drivetrain Decoding' started by Ranger Eleven, Nov 14, 2017.

  1. Ricks72Z28

    Ricks72Z28 Veteran Member Lifetime Gold Member

    801
    5
    Jan 1, 2005
    Schererville,In.46375
    That was the same story with my original block too... Got lucky and found a carb to pan original CKS engine.
     
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  2. Ranger Eleven

    Ranger Eleven 1972 Z28

    17
    0
    Oct 30, 2017
    Cassville MO
    What's with the 8k tachometer? Was it an option? Again...mine doesn't have one but I've crawled around under dash and it's all original...
     
  3. Budz

    Budz Veteran Member Lifetime Gold Member

    2,878
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    Mar 17, 2002
    Ashburn, Va USA
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  4. Ranger Eleven

    Ranger Eleven 1972 Z28

    17
    0
    Oct 30, 2017
    Cassville MO
    Thanks...it doesn't address tach that I can see.
     
  5. Ricks72Z28

    Ricks72Z28 Veteran Member Lifetime Gold Member

    801
    5
    Jan 1, 2005
    Schererville,In.46375
    Post a picture of the dash and tach...
     
  6. Ranger Eleven

    Ranger Eleven 1972 Z28

    17
    0
    Oct 30, 2017
    Cassville MO
    Dash pics...
     

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  7. Ranger Eleven

    Ranger Eleven 1972 Z28

    17
    0
    Oct 30, 2017
    Cassville MO
    One theory is that when the original engine was replaced with a crate engine, the tach was swapped out....now that the correct motor has been reinstalled the tach was not replaced....probably due to availability. Under dash I cannot see evidence of removal however....
     
    Last edited: Nov 17, 2017
  8. 70lt1z28

    70lt1z28 Veteran Member Gold Member

    1,276
    139
    Oct 3, 1999
    Beavercreek, Ohio, USA
    Rare that someone would go to the trouble of changing the tach to match the particular engine. Can't say I have EVER heard of that happening. If it was a warranty job, they would have swapped it wit the right engine.
    Possibly the original tach died and they swapped in whatever they could find. That is definitely a base motor (non-Z) gage package. In 72 that still had the LT-1 that had a 6500 RPM redline, but it may have been a 7 grand max (8 grand in 70-71) on the tach.
    It is also virtually impossible that the factory put in the wrong gage package. Can't say completely impossible because it WOULD actually fit, but the quality control was at least that good back then. Some would like to believe that they just threw these cars together with whatever was floating around the assembly area, but that's just not the way it was on major items like this.
     
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  9. Ranger Eleven

    Ranger Eleven 1972 Z28

    17
    0
    Oct 30, 2017
    Cassville MO
    The first engine swap was done out of warranty in 2000 I believe...the second with the correct engine was in 06. I like your "the tach konked" story better!
     
  10. Budz

    Budz Veteran Member Lifetime Gold Member

    2,878
    27
    Mar 17, 2002
    Ashburn, Va USA
    Below info from this site's "Spotters Guide" doesn't help with the tach question, but if you're trying to determine that it's a real Z/28 this should answer it. Fifth position in the VIN must be an "L" if it's a Z/28.

    "Verifying a 1972 Z28 or Super Sport:

    Starting in 1972 the specific engines are coded into the VIN making picking out Z28's and SS models quick. The engine code for a Z28 is "L". Period. Only Z28's got an engine code of "L". What this means is a 1972 Z28 will have an L in the 5th position of the vin. If it's there - the car is a Z28. If it's not there, the car is NOT a Z28. Case closed."
     

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