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th350/np203 to a th400 or 700r4/205 swap

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by dnp89GMC, Sep 10, 2001.

  1. dnp89GMC

    dnp89GMC Registered Member

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    Location:
    Prescott, AZ
    bit of a dilema here... I'm looking at a '73 K5 with a 6' lift and a 396 BBC, th350/np203. If it get this, should I put the raptor in with a np205 (come with truck, org mated to an sm465) or should I go with a hd th400 that I have that needs a rebuild? the th400 to np205 conversion costs like $450 and no OD. however, the truck has 3.73's in it running 16x35x15 boggers, so if i go with the OD then I need new gears.

    Any suggestions? Troubles I'll runn into? What about the driveshafts do I need to know when doing the swap?

    Thanks
    Pete

    '89 GMC Jimmy- 355, 700r4, 6" Front springs, custom 6" rear shackle flip, D44 w/10 bolt knuckles, 14FF rear. Need- Raptor, Ox locker, '73 tub, ect.
     
  2. dnp89GMC

    dnp89GMC Registered Member

    Joined:
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    Location:
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    ttt

    '89 GMC Jimmy- 355, 700r4, 6" Front springs, custom 6" rear shackle flip, D44 w/10 bolt knuckles, 14FF rear. Need- Raptor, Ox locker, '73 tub, ect.
     

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