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1965 GMC metamorphorsis

Discussion in 'The Garage' started by houndogrollin, Apr 26, 2007.

  1. houndogrollin

    houndogrollin Registered Member

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    I have a 1965 GMC I converted to 4X4 (1974 Chevy Parts) to '65 frame.My coversion includes a 350ci V8.I now want to put the body and bed on a '85 or around there Blazer 6.2 Diesel (both around 117in).Military has TH400 ,but I would like the overdrive of 700r.Will these both interchange on tranfercase and engine mounting.I have experience with manual trans but know little of later model autos. I will probably ask many more questions before I dive in again.Last time I had no computer and no access to a forum this will be a big help.Thanks.
     
  2. b454rat

    b454rat 1/2 ton status Premium Member

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    The 400 and 700 have different adaptor bolt patterns, and spline count/size. If you want to run a 208/241, then just get one off a 700, but if you want to run a 205, then need to get one off a Turbo 350, and the adaptor, and have to swap output shafts, or cut the excess off. Hopefully someone else will chime in, gotta go to work!!
     
  3. REDCRO_REDNECK

    REDCRO_REDNECK 1/2 ton status

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    why swap bodies when you can swap motors?
     
  4. houndogrollin

    houndogrollin Registered Member

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    ch tranfer case does the military Blazer with TH400 use?Thanks for you help.
     
  5. thedrip

    thedrip 1/2 ton status

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  6. houndogrollin

    houndogrollin Registered Member

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    65 Gmc

    :confused: With a gas engine I have prefered a manual tranny, muncie w/compound ,but going to a diesel I am leaning to an auto trans. I have heard mixed reports on 700r .What is the main rap on it? What about BM or Raptor version.85% of my driving is on paved roads ,desert explore ,mountain wood houling or hunting is balance.In New Mexico it is a long way from here to there,so fuel miliage is a concern.
     
    Last edited: Apr 27, 2007
  7. houndogrollin

    houndogrollin Registered Member

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    Crossmembers can be a problem when changing year models,also I want to eliminate the NP 203 .
     
  8. u2slow

    u2slow 1/2 ton status

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    I alredy preferred a manual trans, but the switch to 6.2 diesel made me want/need it even more.
     
  9. 55Willy

    55Willy 3/4 ton status

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    heres my 2 cents 1) a diesel should never have an auto behind it

    2) a blazer has a 106" wheelbase. makes for a short short bed truck.
     
  10. houndogrollin

    houndogrollin Registered Member

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    I appreciate the input my profession is a 48 states truck driver ,I prefer a manual but not just a 4 spd.My time to work on my trk is very limited.What is the problem with the 700R,are the B&M or Raptor a good choices over stock.On automatics I know little.
     
  11. u2slow

    u2slow 1/2 ton status

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    Besides the TH700 being a light-duty (1/2-ton) trans... the 6.2L NA doesn't have any power to spare, so you can't afford to throw any away with the auto. However, the TH700 is certainly more driveable (IMO) than the TH400.

    Maybe a manual valve body and a floor shifter? :D
     
  12. houndogrollin

    houndogrollin Registered Member

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    700r4 replacement

    Anybody have any info on B&M or Raptor versions of 700r4.I am considering a 6.2 and putting a Banks turbo on it , Im looking at miliage and dependability I hope.
     

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