Enter your username:
Do you want to login or register?
  • Forgot your password?

    Login / Register



    Results 1 to 12 of 12
    1. #1
      Join Date
      Jan 2008
      Posts
      86

      What's the best replacement chassis for the 68-72 GM A-body?

      They seem all at $20k+ complete (much higher w/IRS). I'm thinking of just just using one of the frame stiffening kits for under $1k that would stiffen the stock one up quite a bit, but its still an old design and all the other suspension pieces add up too. I'm looking at maybe 600hp tops, and I want great handling and comfortable ride but this won't be a track car. For those that went aftermarket chassis, love to hear which one you went with and why? TIA!

    2. #2
      Join Date
      Feb 2009
      Location
      Laramie, WY
      Posts
      550
      Country Flag: United States
      What type of A body do you have. Since you are not building a track car. Myself I wouldn't spend the cash on an aftermarket frame. I would get a good suspension system. Maybe a Ride tech air ride. it would give you the comfort and handling. As far as stiffing up the chassis, just box it yourself.

      tim
      1971 Buick Sportwagon pro-touring project.
      1985 Ford Crown Victoria 2 door
      2000 Ford Crown Victoria

    3. #3
      Join Date
      Dec 2008
      Location
      Detroit
      Posts
      2,584
      Country Flag: United States
      I agree with PT Sportwagon. You can have great handling without a full chassis. I see guys on the Pro Touring Chevelle group all the time throwing out suggestions of a chassis when a guy asks for something suspension wise. Of the ones suggesting a chassis and owning one themselves, i would imagine less than half of them only want a PT look car and have no intention of ever using the chassis to its full ability.
      If you want to stay with one vendor for a setup, you can go all Speedtech because they offer a brace kit and suspension. I also wouldn't hesitate to use UMI or ridetech in conjunction with the Speedtech brace kit.
      Big dreams, small pockets....

      Chris--
      '72 Cutlass S LSA/T56 Magnum
      Bowler Performance, Rushforth Wheels, ATS, Holley EFI, KORE3, Ridetech

      Project Motor City Madness

    4. #4
      Join Date
      Sep 2010
      Location
      Martinez, CA
      Posts
      184
      Country Flag: United States
      I agree a custom chassis isn’t worth the outlay for 99% of us but if money were no object....
      I’d buy the Morrison chassis. I don’t think I’d go for the IRS because it looks HEAVY.

      And in retrospect I wish I’d boxed my frame before powder coating and reassembly. Mines a daily driver and doesn’t really need it but you never know what the future holds.

    5. #5
      Join Date
      Feb 2014
      Posts
      14
      Country Flag: Canada
      I would have gone with a Art Morison but they didn't offer a rear set up that I liked. So instead I boxed my 65gto frame with a Hellwig and was impressed with how it fit.I also went with a complete Detroit Speed front end with a splined sway bar and a Heidts IRS.I also narrowed the rear section at the same time.I installed a kit from I believe Speed Tech to run true coil overs front and rear with big brakes. I still spent the same money but got what I wanted. This set me back probably a year and if I was to do another car I would use a Roadster Shop which wasn't available at the time.One more point is that a car with a brand name chassis is going to be worth more then what I did providing the rest of the car is the same.This is just my opinion and I've been know to be wrong.I did start this project with wanting the car to be street friendly but able to run a auto cross and be respectable.

    6. #6
      Join Date
      Feb 2019
      Location
      Kankakee IL
      Posts
      362
      Box yours yourself and save $.
      Tracey

    7. #7
      Join Date
      May 2010
      Location
      kitchener,Ontario,Canada
      Posts
      2,336
      Country Flag: Canada
      Quote Originally Posted by Tsaints1115 View Post
      Box yours yourself and save $.
      X2 ... speedtech,abc performance, hellwig and hpi all make brace kits for the frames .. then toss a good suspension on . You will save huge money and it will handle just as well

      Spinnin'my tires in life's fast lane

      Ryan Austin
      On twitter @raustinss
      On Instagram austinss70


    8. #8
      Join Date
      Apr 2014
      Location
      JAPAN
      Posts
      147
      Country Flag: Japan
      I am also interested in this topic. I'm currently enjoying my 70 Camaro with Speed ​​Tech Torque Arms. My next car is a 69 Oldsmobile 442 and I'm wondering if I should change the chassis or the original frame with a suspension upgrade. The engine is scheduled for LSA.

    9. #9
      Join Date
      May 2010
      Location
      kitchener,Ontario,Canada
      Posts
      2,336
      Country Flag: Canada
      Simple answer.. no .. read above reasons ..
      Spinnin'my tires in life's fast lane

      Ryan Austin
      On twitter @raustinss
      On Instagram austinss70

    10. #10
      Join Date
      Aug 2004
      Location
      Harriman, Tennessee
      Posts
      1,288
      Country Flag: United States
      If I had the money, I'd go with a Roadster Shop IRS chassis. If you on more of a budget, there is a lot you can do with the stock chassis.
      Why do termites eat houses?

      Because they have
      Munchausen Syndrome.

    11. #11
      Join Date
      Feb 2023
      Location
      North Carolina
      Posts
      29
      Country Flag: United States
      I am not sure if Speedtech makes a chassis for a 67-72 GM A-body, but you should check and see. They have great products and I used them for my build.

    12. #12
      Join Date
      May 2010
      Location
      kitchener,Ontario,Canada
      Posts
      2,336
      Country Flag: Canada
      Speedtech does make a chassis for 68 -72 .. but like .all others .. the price is significantly higher than the cost of a stock frame reinforced with quality suspension components
      Spinnin'my tires in life's fast lane

      Ryan Austin
      On twitter @raustinss
      On Instagram austinss70





    Advertise on Pro-Touring.com