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Thread: 72 RS Prototype Hot Rod Build!

  1. #1
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    72 RS Prototype Hot Rod Build!

    This one is mine so time for a build thread! So, when your buddy calls you up and says hey I'm going to sell my 72 what do you think is the best way to approach that? I say let me look at it closely as the first time I saw the car I didn't really inspect it with that in mind. So, I meet him off of the freeway as the car was on his flatbed trailer to take a close look at it. After about 10 minutes looking for any signs of rust as that's really my main concern I can tell it's truly a rust free Southern California car with a perfect original dash (Unicorn)! I tell him I'd actually like to buy it so we make the deal and take it to my house. Some of you in So. Cal will know the car. It's a non sunroof, non A/C light yellow 72T with pin stripes done by a famous guy named Shakey Jake back in the day. The exterior of the car will look like the 72 RS prototype factory car #9113600012. I'm going to paint it Signal Green (more on the paint to follow). I drove the car for awhile doing small upgrades along the way but the engine and transmission leaked oil so I decided to just start the build. Here we go!!
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    Last edited by Longballa; 11-28-2021 at 04:45 PM.
    72S, 72T now ST

  2. #2
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    Here's a pic of #9113600012 and of a 73 with Signal Green paint.
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    72S, 72T now ST

  3. #3
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    So, I have the car torn down and ready for paint. I removed the engine which isn't original to the car. At some point early on the engine was replaced with a un stamped factory 7R replacement case built to S specs. I replaced the flywheel seal and did a valve adjustment so I'm hoping that takes care of the engine leaks. I also installed new SSI's and cleaned up the engine. I'll reinstall this engine as I wait for my 3.2SS EFI twin plug to be finished by Rothsport. The transmission will get short gears 2-4 and a LSD.
    72S, 72T now ST

  4. #4
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    Absolutely love Signal Green. Have only seen it in person on one car - very rare shade. I don’t know much about the RS history including not knowing that there was a ‘72 prototype. What are the significant differences from the prototype to the production version?
    Bill

    Early 911S Registry Member #4087
    Instagram: @myflat6

    '72T hotrod 210 0228
    '82SC Targa
    '97C4S (sold - and regretting it)

  5. #5
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    RS flares will be added and I'll be removing the passenger side battery box for the oil cooler. I will run all the RS decorative trim. Brown carpet and brown leather custom interior. Ivory headliner. Plaid seat inserts. Fuchs 7 and 8 15's with P7 tires 205 and 225's will be used.
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    72S, 72T now ST

  6. #6
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    I love Signal Green also and all the Signal colors. Signal Green has a few color codes for the different years but I wanted the #7878 70-73 code which isn't available anymore in the 22 line. I had the current codes mixed and could tell right off they weren't correct. So, I had my Glasuirt rep find out why 7878 wasn't available anymore from the original formula and it was because 2 of the toners were discontinued. Toner M96 and M40. So, I tracked down the 2 toners and found some NOS product overseas. I bought it and had Industrial finishes mix it up with the other toners they had that are still available and it's perfect. I think I have the last 2 gallons anywhere.
    Quote Originally Posted by myflat6 View Post
    Absolutely love Signal Green. Have only seen it in person on one car - very rare shade. I don’t know much about the RS history including not knowing that there was a ‘72 prototype. What are the significant differences from the prototype to the production version?
    72S, 72T now ST

  7. #7
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    Quote Originally Posted by myflat6 View Post
    Absolutely love Signal Green. Have only seen it in person on one car - very rare shade. I don’t know much about the RS history including not knowing that there was a ‘72 prototype. What are the significant differences from the prototype to the production version?

    RS #9113600012 had the S front bumper and no rear engine lid spoiler/duck tail and was built on the 72 chassis. If you search the vin # there's a lot of info about it.
    72S, 72T now ST

  8. #8
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    S front bumper, no ducktail, 7/8 Fuchs and signal green.......

    Name:  IMG_4956.jpg
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  9. #9
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    Build sounds awesome.

    Now that you point out some differences from the prototype RS I can see them very clearly in the photo you posted. Very cool. And I love the color!
    Bill

    Early 911S Registry Member #4087
    Instagram: @myflat6

    '72T hotrod 210 0228
    '82SC Targa
    '97C4S (sold - and regretting it)

  10. #10
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    Nice! Very cool. Mine will have the trim and no driving/fog lights and 72 lenses and grills but yeah that's the ticket.
    Quote Originally Posted by dirk07 View Post
    S front bumper, no ducktail, 7/8 Fuchs and signal green.......

    Name:  IMG_4956.jpg
Views: 2445
Size:  118.6 KB
    72S, 72T now ST

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