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  • sbc in a cj7....

    when you put a sbc in a cj7 with a 700r tranny that has a adaptor for the dana 300 transfer case , do you have to move the transfer case back from it's stock location? if so how much? would a 350 turbo be easier to do than the 700r? i would rather use the 700r so i have the overdrive.also it looks like i would have to notch the plate at the transfer case, is there any other issues with the driveshaft hitting the auto. trans. it has a woods shaft on it and it is a bigger diameter than the stock shaft.thanks for the help.

  • #2
    If you change to a sbc and automatic trans nothing will be stock. The engine and trans combination will need to be shifted to the driver side for proper alignment. The combination will yield a shorter drive shaft and the transfer case will not be in the stock location. The TH350 is usually the trans of choice because it is shorter then the 700. I've done this modification with the TH350. Do your research! If you need some dimensions let me know.

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    • #3
      sbc conversion

      why convert , i already have one done for sale. 350sbc with th350

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      • #4
        The TH350 is definitly an easier swap in the length area. If your 80-86 CJ7 came with 6 cyl and sr4,T4 or T5 you will leave the t-case in stock position. The adapter is built to match that OEM combo only. You will then use stock frt & rr shafts. All jeep engines were offset to d/s 1" and so will the bowtie conbo when using our mounts. The tranny pan to front shaft clearence is the biggest hurdle in my opinion. I suggest minimum 2" lift (4" is better) and probably bending or knotching tranny pan. Good luck!
        P.S. if you go with the 700R4 plan on CV rear shaft and max t-case loweringing (1" for sure) to make it go.

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        • #5
          Woody,

          What do you think of a sbc 350/ th 400 and 205 set up? I just scored it with TBI and puter for 300.00. I plan on raisinf everything 2 inches to try to have a flat belly.

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          • #6
            Must be the week for long combos. You guys need a CJ8 and this is never a concern. Just kiddin! Besides not everyone can have a long woody!
            Anyhow the TH400 is almost same length as the 700R4 so the CV shaft will probably be needed. This is the deal with the NP205 swap. Front output hangs very low(2" lower than Dana 300) and the rear output is very high on case. If you lift it 2" to clear on belly then your rear shaft is gonna look like a Colorado ski slope! I've seen 205's in Jeeps but they hang low no matter how you approach it. Good luck!

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            • #7
              Thanks, I am actually stetching my 7 out a little bit too. As soon as I get it configured I will post some pics.

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              • #8
                Check out the links for a lot of good info...

                http://www.novak-adapt.com/catalog/kit_137.htm

                http://www.novak-adapt.com/catalog/kit_135.htm

                Bottom line, the 700R4 with the adapter is only 1.9 inches longer than the TH350 with the adapter. You may be able to gain some of that back by using the short water pump on the motor and/or using electric fans vice a belt driven fan.

                You should also note that the 700R4 in addition to the 0.7:1 overdrive has a lower first gear ratio of 3.06:1 compared to the TH350 and TH400 at 2.52 and 2.48 respectively. Also the 700R4 almost always had a lockup torque converter, while this complicates the install a bit (a special kit is needed to properly actuate the lockup) it has the effect of increasing fuel economy at cruise, an important point with todays fuel prices.

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                • #9
                  I used a SBC in my 78 CJ7 with a TH400. I used the Quadra-Trac transfer case and welded in the motor mounts such that no adapters or drive shaft changes were required. The GM TH400 was rebuilt with the AMC TH400 output shaft. This was the most effective way for me to get the SBC in and not spend any money on pricey adapters. The combination has been great so far and I was able to keep the 4:1 low ratio in the Quadra-Trac also.

                  But finally, any combination will work with time and money. Just depends on how many parts you want to change.

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