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TH400 swap?

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  • TH400 swap?

    I don't want to give away too much just yet...

    But does anyone know what I will need in particular to mate a TH400 to a carbed Gen 1 SBC 350/350 in a 3rd Gen car???

    Thanks!

    -Ben

  • #2
    i beleive a th400 bolts right up to a gen 1 SBC




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    • #3
      x2 !
      sigpic
      The LS1 or Go Home Crew

      ASE master certified
      1998 Camarbo z28-going back to stock
      11.3@121 old heads & cam setup




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      • #4
        You will need a crossmember, torque arm mount, and a driveshaft. I've got a crossmember if you need one.

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        • #5
          400's use an electric switch for kickdown

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          • #6
            You'll Need

            A torque converter built for your application {By Me}


            Mike.

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            • #7
              Spohn makes some really nice stuff for a decent price.

              Cross memebers
              http://www.spohn.net/shop/1982-1992-...-Crossmembers/

              They also have complete tq arms setup for any tranny..
              http://www.spohn.net/shop/1982-1992-...n/Torque-Arms/

              And the drive shafts for any tranny...
              http://www.spohn.net/shop/1982-1992-...y-Driveshafts/

              It's a bit of money but nice quality stuff, I plan on swapping all mine out for it.

              You can also fab them up pretty cheep too if you or someone you know is good with metal. I tossed mine out when I switched back to the th350 sorry.

              The drive shaft isn't too hard eaither. If you have a shop near by that repairs driveshatfs they can swap off the yoke and swap on a th400 one, shorten it, and balance it all in one shot. If your going crazy on power your gonna want a strong driveshaft anyways so might as well get a new one if that is the case.

              Another thing you have to make sure of is that you have the dual pattern flex plate.
              Originally posted by Frank The Tank
              Took the restrictor plate off to give the Red Dragon a little more juice. But it's not exactly street legal, so keep it on the down low.

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              • #8
                Thank you guys! I will keep you posted when I come up with something.

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                • #9
                  Eh, unfortunately the deal was not as sweet as it may have looked so I backed out on the car. I'm still on the lookout for a V8 but I have learned several good lessons about old cars that should help. Hopefully if Shawn still has his GTA I can work on getting that. It should be in better shape than this car.

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                  • #10
                    Still have it.... I actually did some sanding to the bubbled spots on the paint and primered it black.. I was gonna "murder it out" lol. My GTA sits in the garage. Needs some work and have a few friends on the lookout for a windshield.

                    Currently in the process of building a solid TH350 trans myself full manual valve body and what not. Gonna spray the 385 to death. I can't afford to build my turbo project just yet.
                    You buying my car could sprout some progress though
                    -08 G8 GT DD: Rotofab CAI, HID's, Breyton Race GTS'
                    -86 Iroc Project: LQ4, Th400, S400, Ford 9"

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